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Question : 25
Total: 37
Figure shows the stopping potential ( V 0 )
B , λ
(b) If the distance between the light source and the surface of metalA
(a) How is the value of Planck's constant determined from the graph ?
(b) If the distance between the light source and the surface of metal
Solution:
(a) Planck's constant can be determined from the gradient of the graph.
Gradient =
h =
c =
e =
Gradient to be measured from graph. The values ofc e h
(b) If distance between source of light and surface of metal A is increased, the intensity of incident light decreases. But stopping potential does not depend on the intensity of the incident light. So, the stopping potential will not be affected.
Gradient to be measured from graph. The values of
(b) If distance between source of light and surface of metal A is increased, the intensity of incident light decreases. But stopping potential does not depend on the intensity of the incident light. So, the stopping potential will not be affected.
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