In normal state of energy the incident high energy photons will be______________?

Related Mcqs:

1. 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

2. A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ?

   A. λ
   B. Speed of sound
   C. Speed of lightB.
   D. h

3. The minimum wavelength of X-rays produced by the bombardment of electrons on the screen of a television set where the accelerating potential is 2.0K V will be______________?

   A. 6.2 x 10-10m
   B. 9.1 x 10-18m
   C. 3.11 x 10-10m
   D. 4 x 10-10m

4. An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________?

   A. 12
   B. 24
   C. 5
   D. 1100

5. For chain reaction to build up the size of the radioactive target should be______________?

   A. Greater than the critical size
   B. Less than the critical size
   C. Equal to the critical size
   D. All of above can build up a change reaction

6. A body of 2 kg is suspended from the ceiling of an elevator moving up with an acceleration g. Its apparent weight in the elevator will be______________?

   A. 9.8 N
   B. 19.6 N
   C. 129.4 N
   D. 39.2 N

7. When light incident normally on thin film the path difference depends upon ________________?

   A. thickness of the film only
   B. nature of the film only
   C. angle of indidence only
   D. all thickness nature and angle of incidence

8. If the wavelength of incident radiation is increased in photoemission then_________________?

   A. The maximum kinetic energy of the photoelectrons increases
   B. The minimum kinetic energy of the photoelectrons decreases
   C. The minimum kinetic energy of the photoelectrons increases
   D. The average kinetic energy of the photoelectrons decreases

9. If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?

   A. chromatic aberration
   B. spherical aberration
   C. both spherical and chromatic
   D. distortion

10. A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________?

    A. center of curvature
    B. focus
    C. optical center
    D. aperture