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The work function of substance is 4.0 eV...

The work function of substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately

A

310 nm

B

400 nm

C

540 nm

D

220 nm

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The correct Answer is:
A
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AAKASH SERIES-DUAL NATURE OF RADIATION AND MATTER-PRACTICE EXERCISEX
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  2. Two photons of energies twice and thrice the work function of a metal ...

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  5. When a monochromatic point source of light is at a distance of 0.2 m...

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  7. A surface irradiated with light of wavelength 480 nm gives out electro...

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  8. What P.D. must be applied to stop the fastest photo electron emitted b...

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  9. The threshold frequency for photo electric effect for a metal surface ...

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  10. The work functions of metals A and B are in the ratio 1 : 2. If light ...

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  11. When a metal surface is illuminated by light of wavelengths 400 nm and...

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  13. A monochromatic source of lightis placed at a large distance d From a ...

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  15. Work function of a metal is 3.0 eV. It is illuminated by a light of wa...

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  16. A metal sheet of silver is exposed to ultraviolet radiation of wavelen...

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  17. The threshold wavelength for emission of photoelectrons from a metal s...

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  18. What will be the minimum frequency of light source to get photocurrent...

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  19. A stationary shell of mass M explodes in to two parts and their masses...

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  20. The graph between deBroglie wavelength (lamda) and (lamdap) is (p is t...

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