MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The component in an optical instrument used to increase the angular object field and to minimize aberrations is called as ___________ |
| A. | Objective lens |
| B. | Eye lens |
| C. | Field Lens |
| D. | Plano-concave lens |
| Answer» D. Plano-concave lens | |
| 2. |
The refractive index of a Plano-convex lens is 1.6 for violet and 1.5 for red light. The radius of curvature is 0.20 cm. The separation between violet and red foci of the lens is ____________ |
| A. | 0.05 cm |
| B. | 0.06 cm |
| C. | 0.07 cm |
| D. | 0.08 cm |
| Answer» D. 0.08 cm | |
| 3. |
If the magnification of a lens is dependent on the distance from the principal axis, the aberration that arises is called __________ |
| A. | Coma |
| B. | Astigmatism |
| C. | Curvature |
| D. | Distortion |
| Answer» E. | |
| 4. |
The far point of a myopic person is 40 cm. What should be the power of the lens that he must use to see clearly? |
| A. | -0.4 D |
| B. | +0.4 D |
| C. | -2.5 D |
| D. | +2.5 D |
| Answer» D. +2.5 D | |
| 5. |
The effective focal length of Ramsden s eyepiece is 3cm. The focal length of a single lens is ___________ |
| A. | 3cm |
| B. | 4cm |
| C. | 5cm |
| D. | 6cm |
| Answer» C. 5cm | |
| 6. |
Two lenses of focal length 8 cm and 6 cm are placed a certain distance apart. If they form an achromatic combination, the separation between them is ___________ |
| A. | 5cm |
| B. | 6cm |
| C. | 7cm |
| D. | 8cm |
| Answer» D. 8cm | |
| 7. |
A thin converging lens and a thin diverging lens of each focal length 10 cm are placed coaxially 5cm apart. What will be the focal length of the combination? |
| A. | +10cm |
| B. | -10cm |
| C. | +20cm |
| D. | -20cm |
| Answer» D. -20cm | |
| 8. |
The condition in which lines in one direction appear to be well focused while those in perpendicular direction appear distorted is known as ___________ |
| A. | Presbyopia |
| B. | Myopia |
| C. | Hypermetropia |
| D. | Astigmatism |
| Answer» E. | |
| 9. |
Which of the following is not a part of an Electron Microscope? |
| A. | Electron Gun |
| B. | Objective |
| C. | Magnetic lens |
| D. | Fluorescent Screen |
| Answer» C. Magnetic lens | |
| 10. |
Huygens s eyepiece is also known as __________ |
| A. | Spherical Eyepiece |
| B. | Positive Eyepiece |
| C. | Negative Eyepiece |
| D. | Double Eyepiece |
| Answer» D. Double Eyepiece | |
| 11. |
X is an optical defect due to which a comet-like image is formed instead of a point image. X is ___________ |
| A. | Coma |
| B. | Astigmatism |
| C. | Curvature |
| D. | Distortion |
| Answer» B. Astigmatism | |
| 12. |
In which of the following instruments, the objective has a large focal length and a very large eyepiece? |
| A. | A simple microscope |
| B. | A Compound microscope |
| C. | Telescope |
| D. | Interferometer |
| Answer» D. Interferometer | |
| 13. |
What is the ratio of the focal lengths of the two Plano-convex lenses in Huygens s Eyepiece? |
| A. | 2:1 |
| B. | 3:1 |
| C. | 3:2 |
| D. | 4:3 |
| Answer» C. 3:2 | |
| 14. |
The inability of a lens to form a white image of a white object is known as ________ |
| A. | Spherical Aberration |
| B. | Chromatic Aberration |
| C. | Monochromatic Aberration |
| D. | Coma |
| Answer» C. Monochromatic Aberration | |