The velocity of laser light is___________________?

Related Mcqs:

1. The metastable state for an atom in laser light is_____________?

   A. 10-4 sec
   B. 10-5 sec
   C. 10-3 sec
   D. 10-8 sec

2. In laser production the state in which more atoms are in the upper state than in the lower one is called_____________?

   A. Metal stable state
   B. Normal state
   C. Inverted population
   D. All the above

3. In He-Ne laser the lasing action is produced by_______________?

   A. Ne only
   B. He-Ne both
   C. Electrons of He
   D. Electrons Ne

4. Reflecting mirrors in laser is used to______________?

   A. Further stimulation
   B. Lasing more
   C. For producing more energetic lasers
   D. All

5. In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?

   A. Becomes double
   B. Remains same
   C. Becomes half
   D. First increases then decrease because of the curvilinear graph

6. A thing that emits its own light is___________________?

   A. luminous
   B. non-luminous
   C. incandescent
   D. bright

7. The velocity of light was determined accurately by_______________?

   A. Newton
   B. Michelson
   C. Huygen
   D. Young

8. The velocity of sound in air would become double than its velocity at 0°C at temperature ?

   A. 313°C
   B. 586°C
   C. 819°C
   D. 1172°C

9. The velocity of sound in air would become double than its velocity at 0°C at temperature________________?

   A. 313°C
   B. 586°C
   C. 819°C
   D. 1172°C

10. hen a body moves in a circle, the angle between its linear velocity and angular velocity is always_______________?

    WA. 180°
    B. 0°
    C. 90°
    D. 45°