question_answer

A caesium photocell, with a steady potential difference of 60V across it, is illuminated by a bright point source of light 50 cm away. When the same light is places 1 cm. away, the photoelectrons emitted from the cell:

A)  are half as numerous

B)  are one quarter as numerous

C)   each carry one quarter of their previous energy

D)  each carry one quarter of their previous momentum.