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.

What will be the relative population of atoms in a ruby layer that produces a light beam of wavelength 6943 Å at 300 K.

A. 5 X 10-31
B. 6 X 10-31
C. 7 X 10-31
D. 8 X 10-31
Answer» E.
Discussion
2.

For a Ruby laser, the coherence time t = 10-10 s. The degree of Monochromaticity is __________

A. 0.13 X 10-4
B. 0.24 X 10-4
C. 0.35 X 10-4
D. 0.47 X 10-4
Answer» B. 0.24 X 10-4
Discussion
3.

The following graph represents the output for which type of LASER?

A. He-Ne Laser
B. Ruby Laser
C. ND: YAG laser
D. Semiconductor Diode laser
Answer» C. ND: YAG laser
Discussion