MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 1489 Mcqs, each offering curated multiple-choice questions to sharpen your 8th Class knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
In which of the following are plane mirrors arranged at an angle to get a number of colored images? |
| A. | Periscope |
| B. | Kaleidoscope |
| C. | Telescope |
| D. | Thermoscope |
| Answer» C. Telescope | |
| 502. |
Which of the following is the characteristic of an ideal mirror? |
| A. | It absorbs all the amount of light incident on it. |
| B. | It refracts all the light. |
| C. | It reflects all the light. |
| D. | All of the above |
| Answer» D. All of the above | |
| 503. |
How is a rainbow formed? |
| A. | When raindrops absorb sunlight |
| B. | When raindrops reflect sunlight |
| C. | When raindrops disperse sunlight |
| D. | When raindrops diffract sunlight |
| Answer» D. When raindrops diffract sunlight | |
| 504. |
Observe the figure given below. Find the angle between the incident and the reflected ray. |
| A. | \[{{65}^{\text{o}}}\] |
| B. | \[{{90}^{\text{o}}}\] |
| C. | \[{{130}^{\text{o}}}\] |
| D. | 25 |
| Answer» D. 25 | |
| 505. |
There are 11 letters in the word EXAMINATION. How many letters of this word are not changed when the word is seen in a plane mirror? |
| A. | 11 |
| B. | 5 |
| C. | 8 |
| D. | 9 |
| Answer» D. 9 | |
| 506. |
An object placed 4 m from a plane mirror 'Br is shifted by 0.5 m away from the mirror. What is the distance between the object and its image? |
| A. | 4 m |
| B. | 3.5 m |
| C. | 9 m |
| D. | 5 m |
| Answer» D. 5 m | |
| 507. |
For a given incident ray, the plane of the mirror makes an angle\[\theta \]with the incident ray, then the reflected ray is turned through\[2\theta .\]Which of the following is based on the above principle? |
| A. | Periscope |
| B. | Kaleidoscope |
| C. | Shaving mirrors |
| D. | Automobile head lights |
| Answer» B. Kaleidoscope | |
| 508. |
The diagram shows the path of a light ray X, directed at a plane mirror. Which of the following is the correct reflected ray? |
| A. | M |
| B. | N |
| C. | O |
| D. | P |
| Answer» C. O | |
| 509. |
With what is glass coated in order to convert it into a mirror? |
| A. | Silver |
| B. | Copper |
| C. | Aluminium |
| D. | Platinum |
| Answer» B. Copper | |
| 510. |
In the diagram, the coin is just out of sight. If water is poured into the metal can, the coin will |
| A. | Become visible |
| B. | Appear smaller |
| C. | Not be visible |
| D. | Float to the surface. |
| Answer» B. Appear smaller | |
| 511. |
Look at the given figure. Find the angle between the incident ray and the reflected ray. |
| A. | \[{{60}^{\text{o}}}\] |
| B. | \[{{90}^{\text{o}}}\] |
| C. | \[{{80}^{\text{o}}}\] |
| D. | \[{{40}^{\text{o}}}\] |
| Answer» D. \[{{40}^{\text{o}}}\] | |
| 512. |
Two plane mirrors AB and CD are placed at right angles to one another. A ray of light PQ hits AB at Q making an angle of \[\text{45 }\!\!{}^\circ\!\!\text{ }\] as shown in the diagram. This ray will be reflected from mirror CD at an angle. |
| A. | \[\text{20 }\!\!{}^\circ\!\!\text{ }\] |
| B. | \[\text{35 }\!\!{}^\circ\!\!\text{ }\] |
| C. | \[\text{45 }\!\!{}^\circ\!\!\text{ }\] |
| D. | \[\text{60 }\!\!{}^\circ\!\!\text{ }\] |
| Answer» D. \[\text{60 }\!\!{}^\circ\!\!\text{ }\] | |
| 513. |
Consider the following statements and select the option which correctly identifies true (T) and false (F).(i) Part that gives colour to the eye is iris.(ii) Transparent outer layer that refracts light is lens.(iii) Retina is a light sensitive layer of the eye.(iv) Cornea is a region without any sensory cells. |
| A. | (i)(ii)(iii)(iv)FTFT |
| B. | (i)(ii)(iii)(iv)TFTT |
| C. | (i)(ii)(iii)(iv)TTFF |
| D. | (i)(ii)(iii)(iv)FFTT |
| Answer» E. | |
| 514. |
The characteristics of an eye disease are given below. (i) Eye sight becomes foggy (ii) Eye lens becomes cloudy (iii) There is a loss of vision In which of the following are the above characteristics observed? |
| A. | Myopia |
| B. | Presbyopia |
| C. | Hypermetropia |
| D. | Cataract |
| Answer» E. | |
| 515. |
Read the given statements and select the correct option. Statement 1: A beam of light emitted by the point source placed in water always diverges in air. Statement 2: The refracted ray moves away from normal when a ray goes from a denser medium to a rarer medium. |
| A. | Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. |
| B. | Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. |
| C. | Statement 1 is true but statement 2 is false. |
| D. | Both statements 1 and 2 are false. |
| Answer» B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. | |
| 516. |
Identify the value of persistence of vision. |
| A. | 1/1 0th of a second |
| B. | 1/12th of a second |
| C. | 1/16th of a second |
| D. | 1/20th of a second |
| Answer» D. 1/20th of a second | |
| 517. |
Match the column I with column II and column III and select correct option from the codes given below. (Note: These columns are for convex lens.) Column I (Position of the object) Column II (Position of the image) Column III (Type of Image(a)Object beyond 2F(i)At 2F(p)Real, inverted, large(b)Object at 2F(ii)Same side as the object(q)Virtual, erect, magnified(c)Object between F and 2F(iii)Beyond 2F(r)Real, inverted, same size(d)Object within the focal length(iv)Between F and 2F(s)Real, inverted, diminished |
| A. | (a)-(ii)-(p);(b)-(iii)-(q);(c)-(iv)-(r);(d)-(i)-(s) |
| B. | (a)-(iv)-(s);(b)-(i)-(r);(c)-(iii)-(p);(d)-(ii)-(q) |
| C. | (a)-(iii)-(q);(b)-(ii)-(s);(c)-(ii)-(r);(d)-(iii)-(p) |
| D. | (a)-(i)-(r);(b)-(iv)-(p);(c)-(i)-(s);(d)-(iv)-(q) |
| Answer» C. (a)-(iii)-(q);(b)-(ii)-(s);(c)-(ii)-(r);(d)-(iii)-(p) | |
| 518. |
What is the nature of image formed on the retina of human eye of an object? |
| A. | Virtual and erect |
| B. | Virtual and inverted |
| C. | Real and erect |
| D. | Real and inverted |
| Answer» E. | |
| 519. |
United Football Club are playing an evening match. The team's jersey has blue and white stripes. What colour would the stripes appear under floodlights which produce a yellow light? |
| A. | Black and yellow |
| B. | Blue and white |
| C. | Blue and yellow |
| D. | Black and white |
| Answer» B. Blue and white | |
| 520. |
In a periscope, how are the reflecting mirrors arranged? |
| A. | Perpendicular to each other |
| B. | Parallel to each other |
| C. | At an angle of \[{{90}^{\text{o}}}\] |
| D. | At an angle of \[{{60}^{\text{o}}}\] |
| Answer» C. At an angle of \[{{90}^{\text{o}}}\] | |
| 521. |
Three light bulbs are concealed from an observer by an opaque wall as shown. Without shifting the positions of the observer and the bulbs, the images of which of the bulbs can the observer see from the plane mirror? |
| A. | P and P |
| B. | P and Q |
| C. | Only P |
| D. | Q and R |
| Answer» C. Only P | |
| 522. |
A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves the source of light away from the lens on its principal axis, the intensity of light |
| A. | Remains constant |
| B. | Continuously increases |
| C. | Continuously decreases |
| D. | First increases than decreases. |
| Answer» D. First increases than decreases. | |
| 523. |
A narrow beam of white light is passed through a glass prism as shown in the figure. Which of the following is the correct order of colours emerging from the prism? |
| A. | PQRRedBlueGreen |
| B. | PQRRedGreenBlue |
| C. | PQRBlueGreenRed |
| D. | PQRBlueRedGreen |
| Answer» C. PQRBlueGreenRed | |
| 524. |
In our houses, which of the following is used for looking at ourselves? |
| A. | Convex mirror |
| B. | Concave mirror |
| C. | Convex lens |
| D. | Plane mirror |
| Answer» E. | |
| 525. |
The diagram shows a ray PQR travelling through a glass slab. Which option in the table gives the correct name for all three rays? |
| A. | PQRIncident rayEmergent rayRefracted ray |
| B. | PQRIncident rayRefracted rayEmergent ray |
| C. | PQREmergent rayIncident rayRefracted ray |
| D. | PQREmergent rayRefracted rayIncident ray |
| Answer» C. PQREmergent rayIncident rayRefracted ray | |
| 526. |
For the myopic eye, the defect is cured by |
| A. | Convex lens |
| B. | Concave lens |
| C. | Cylindrical lens |
| D. | None of these. |
| Answer» C. Cylindrical lens | |
| 527. |
An optician holds a test card 50 cm behind a patient. The patient then looks in the plane mirror which is 100 cm away. How far away from the patient's eyes is the image of the test card? |
| A. | 100 cm |
| B. | 150 cm |
| C. | 200 cm |
| D. | 250 cm |
| Answer» E. | |
| 528. |
X is a surface that cannot produce clear images. What is X? |
| A. | Rough surface |
| B. | Ideal surface |
| C. | Smooth surface |
| D. | Smooth but curved surface |
| Answer» B. Ideal surface | |
| 529. |
The change in focal length of an eye lens is caused by the action of the |
| A. | pupil |
| B. | retina |
| C. | ciliary muscles |
| D. | iris |
| Answer» D. iris | |
| 530. |
The angle of incidence is the angle made by the incident ray with |
| A. | The surface |
| B. | Normal to the surface |
| C. | The reflected ray |
| D. | The refracted ray |
| Answer» C. The reflected ray | |
| 531. |
A straight stick partially immersed under water obliquely appears to be bent due to |
| A. | Reflection |
| B. | Refraction |
| C. | Total internal reflection |
| D. | Parallax error |
| Answer» C. Total internal reflection | |
| 532. |
If the radius of curvature of a concave mirror is R, its focal length is |
| A. | 2 R |
| B. | R |
| C. | R/2 |
| D. | 2/R |
| Answer» D. 2/R | |
| 533. |
If a person wants to see his fall size image, the minimum height of a plane mirror should be |
| A. | Two times his height |
| B. | Equal to his height |
| C. | Half his height |
| D. | One fourth his height |
| Answer» D. One fourth his height | |
| 534. |
An object 5 cm high is placed at a distance of 15cm from a concave mirror of radius of curvature 20 cm. The height of the image in cm is |
| A. | 5 cm |
| B. | 20 cm |
| C. | 15 cm |
| D. | 10 cm |
| Answer» E. | |
| 535. |
If the object is placed 10 cm in front of a convex mirror of radius of curvature 20 cm, the magnification is |
| A. | 2 |
| B. | 1 |
| C. | 1/2 |
| D. | 0 |
| Answer» D. 0 | |
| 536. |
A long vertical pin placed at 40 cm, in front of a concave mirror gives an image at the same position. The focal length of the mirror in meters is |
| A. | 0.2 m |
| B. | 0.4 m |
| C. | 0.6 m |
| D. | 0.8 m |
| Answer» B. 0.4 m | |
| 537. |
A ray of light that falls on an eye first passes through the |
| A. | pupil |
| B. | cornea |
| C. | eye lens |
| D. | aqueous humour |
| Answer» C. eye lens | |
| 538. |
A clock hung on a wall of a hall has marks instead of numerals on its dial. On the opposite wall, there is a plane mirror and the image of the clock in the mirror indicates the time 7.40. hence, the time on the clock is |
| A. | 7.40 |
| B. | 4.20 |
| C. | 5.40 |
| D. | 10.7 |
| Answer» C. 5.40 | |
| 539. |
Let the incident ray be fixed. Now, if a plane mirror is rotated through an angle of \[{{20}^{o}}\] about an axis lying in its plane, then the reflected ray turns through an angle |
| A. | \[{{60}^{o}}\] |
| B. | \[{{40}^{o}}\] |
| C. | \[{{10}^{o}}\] |
| D. | \[{{30}^{o}}\] |
| Answer» C. \[{{10}^{o}}\] | |
| 540. |
A light bulb is placed between two plane mirrors inclined at an angle of \[{{60}^{o}}.\]The number of images formed are |
| A. | 6 |
| B. | 12 |
| C. | 5 |
| D. | 4 |
| Answer» D. 4 | |
| 541. |
A plane mirror is approaching you at 10 cm per second. You can see your image in it. At what speed will your image approaches you. |
| A. | 5 cm/s |
| B. | 25 cm/s |
| C. | 20 cm/s |
| D. | 15 cm/s |
| Answer» D. 15 cm/s | |
| 542. |
The number of images observable between two parallel mirrors is |
| A. | 12 |
| B. | 4 |
| C. | 16 |
| D. | infinite |
| Answer» E. | |
| 543. |
The light appears to travel in straight line because |
| A. | It consists of small particles |
| B. | The velocity of light is very large |
| C. | The wavelength of light is very small |
| D. | Light is reflected by surroundings |
| Answer» D. Light is reflected by surroundings | |
| 544. |
A ray of light is incident on a plane mirror at an angle of incidence of 30°. The deviation produced by the mirror is |
| A. | \[{{30}^{o}}\] |
| B. | \[{{60}^{o}}\] |
| C. | \[{{90}^{o}}\] |
| D. | \[{{120}^{o}}\] |
| Answer» E. | |
| 545. |
If the velocity of light in vacuum is c cm/s, then the velocity of light in a medium of refractive index 1.5 is __ |
| A. | 1.5 c |
| B. | c |
| C. | c/1.5 |
| D. | can have any velocity |
| Answer» D. can have any velocity | |
| 546. |
A plane mirror reflecting a ray of incident light is rotated through an angle \[\theta \], about an axis through the point of incidence, in the plane of the mirror perpendicular to the plane of incidence. Then (i) The reflected ray does not rotate (ii) The reflected ray rotates through an angle \[\theta \] (iii) The reflected ray rotates through an angle \[2\theta \] (iv) The incident ray is fixed |
| A. | Only (i) is correct |
| B. | (i) and (iii) are correct |
| C. | (iii) and (iv) are correct |
| D. | (ii) and (iv) are correct |
| Answer» D. (ii) and (iv) are correct | |
| 547. |
When a light travels from one medium to another medium which are separated by sharp boundary, the characteristic which does not change is |
| A. | Velocity |
| B. | Wave length |
| C. | Frequency |
| D. | Amplitude |
| Answer» D. Amplitude | |
| 548. |
The refractive index of glass is 1.5 and speed of light in air is\[3\times 1010\text{ }cm/s\], the speed of light in glass is |
| A. | \[4.5\times {{10}^{10}}\text{ }cm/s\] |
| B. | \[2\times {{10}^{10}}\text{ }cm/s\] |
| C. | \[0.5\times {{10}^{10}}\text{ }cm/s\] |
| D. | \[1.5\times {{10}^{10}}\text{ }cm/s\] |
| Answer» C. \[0.5\times {{10}^{10}}\text{ }cm/s\] | |
| 549. |
The number of images of an object placed between two plane mirrors at \[{{45}^{o}}\] to each other is |
| A. | 2 |
| B. | 7 |
| C. | 8 |
| D. | 10 |
| Answer» C. 8 | |
| 550. |
Which part of the human eye contracts and relaxes in order to adjust the focal length of the lens? |
| A. | Iris |
| B. | Pupil |
| C. | Blind spot |
| D. | Ciliary muscles |
| Answer» E. | |