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When a metallic surface is illuminated w...

When a metallic surface is illuminated with radiation of wavelength `lambda`, the stopping potential is `V`. If the same surface is illuminated with radiation of wavelength `2 lambda` , the stopping potential is `(V)/(4)`. The threshold wavelength surface is :

A

`5 lamabda`

B

`(5)/(2) lambda`

C

`3 lambda`

D

4lambda`

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NARAYNA-DUAL NATURE OF RADIATION AND MATTER-EXERCISE - 3
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  14. When a certain metallic surface is illuminated with mono chromatic lig...

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  15. A photoelectric surface is illuminated successively by monochromatic l...

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  16. Light of wavelength 500 nm is incident on a metal with work function 2...

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  19. An electron of mass m and a photon have same energy E. The ratio of de...

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  20. When a metallic surface is illuminated with radiation of wavelength la...

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