Explore topic-wise MCQs in Engineering Physics Questions and Answers.

This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

The following graph is pictorial representation of _________

A. Spontaneous emission
B. Spontaneous Absorption
C. Stimulated emission
D. Stimulated Absorption
Answer» D. Stimulated Absorption
Discussion
2.

For an ordinary light source, the coherence time t = 10-10 s. The degree of Monochromaticity for a wavelength of 6000 Å is ___________

A. 0.1 X 10-4
B. 0.2 X 10-4
C. 0.3 X 10-4
D. 0.4 X 10-4
Answer» C. 0.3 X 10-4
Discussion
3.

Laser light from a 2mW source of aperture diameter 1.5 cm and wavelength 5000 Å is focused by a lens of focal length 20 cm. The intensity of the image is __________

A. 1.57 X 106 Wm-2
B. 2.57 X 106 Wm-2
C. 3.57 X 106 Wm-2
D. 4.57 X 106 Wm-2
Answer» D. 4.57 X 106 Wm-2
Discussion