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1. Multiple Choice Questions (MCQ): Put tick marks on the correct answers. [1x5=5] a) A black body absorbs/emits (a) only UV radiations (c) only visible lights (b) only IR radiations (d) all kinds of radiations b) For pair production photon interact with nucleus and produces (a) electron (b) positron (c) proton (d) electron and positron c) Photo electrons could have kinetic energy for a metal when incident photon's wavelength is to/than the cutoff wave length of that metal. (a) equal (b) greater (c) less (d) none d) Work function of a metal _ (a) depends on the wave length of the incident photons (b) is constant for a metal (c) both (d) none e) For Compton effect the change in wave length of the incident x-ray is maximum when the scattering angle becomes (a) 0° (c) 180° (b) 90° (d) 360° 2. Explain: a) Photo electric effect, b) Ultraviolet catastrophe [2+3]

          1. Multiple Choice Questions (MCQ): Put tick marks on the correct answers. [1x5=5]
a) A black body absorbs/emits
(a) only UV radiations
(c) only visible lights
(b) only IR radiations
(d) all kinds of radiations
b) For pair production photon interact with nucleus and produces
(a) electron
(b) positron
(c) proton
(d) electron and positron
c) Photo electrons could have kinetic energy for a metal when incident photon's wavelength is
____ to/than the cutoff wave length of that metal.
(a) equal
(b) greater
(c) less
(d) none
d) Work function of a metal _____
(a) depends on the wave length of the incident photons
(b) is constant for a metal
(c) both
(d) none
e) For Compton effect the change in wave length of the incident x-ray is maximum when the
scattering angle becomes
(a) 0°
(c) 180°
(b) 90°
(d) 360°
2. Explain: a) Photo electric effect, b) Ultraviolet catastrophe [2+3]

1. Multiple Choice Questions (MCQ): Put tick marks on the correct answers. [1x5=5]
a) A black body absorbs/emits
(a) only UV radiations
(c) only visible lights
(b) only IR radiations
(d) all kinds of radiations
b) For pair production photon interact with nucleus and produces
(a) electron
(b) positron
(c) proton
(d) electron and positron
c) Photo electrons could have kinetic energy for a metal when incident photon's wavelength is
to/than the cutoff wave length of that metal.
(a) equal
(b) greater
(c) less
(d) none
d) Work function of a metal
(a) depends on the wave length of the incident photons
(b) is constant for a metal
(c) both
(d) none
e) For Compton effect the change in wave length of the incident x-ray is maximum when the
scattering angle becomes
(a) 0°
(c) 180°
(b) 90°
(d) 360°
2. Explain: a) Photo electric effect, b) Ultraviolet catastrophe [2+3]

Added by Charles V.

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