When light falls on a metal surface, the maximum kinetic energy of the emitted photo-electrons depends upon
When light falls on a metal surface, the maximum kinetic energy of the emitted photo-electrons depends upon
- A
The time for which light falls on the metal
- B
Frequency of the incident light
- C
Intensity of the incident light
- D
Velocity of the incident light
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Average force exerted on a non-reflecting surface at normal incidence is $2.4 \times 10^{-4} \mathrm{~N}$. If $360 \mathrm{~W} / \mathrm{cm}^2$ is the light energy flux during span of $1$ hour $30$ minutes. Then the area of the surface is:
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