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The threshold frequency for a metallic s...

The threshold frequency for a metallic surface corresponds to an energy of `6.2eV` and the stopping potential for a radiation incident on this surface is `5 V` . The incident radiation lies in

A

ultra-violet region

B

infra-red region

C

visible region

D

X-ray region

Text Solution

Verified by Experts

The correct Answer is:
A
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MOTION-MODERN PHYSICS -1-EXERCISE-4(LEVEL-I)
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  2. The time taken by a photoelectron to come out after the photon strikes...

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  3. The threshold frequency for a metallic surface corresponds to an energ...

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  4. An alpha nucleus of energy (1)/(2)m nu^(2) bombards a heavy nucleus o...

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  5. Photon of frequency v has a momentum associated with it. If c is the v...

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  6. Which of the following transition in hydrogen atom emit photons of big...

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  7. Suppose an electron is attracted toward the origin by a force(k)/(r ) ...

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  8. The surface of a metal illuminated with the light of 400 nm. The kinet...

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  9. The transition from the state n = 4 to n = 3 in a hydrogen-like atom r...

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  10. If a source of power 4 kW produces 10^(20) photons//second, the radiat...

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  11. Statement - 1 : When ultraviolet light is incident on a photocell , it...

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  12. Statement I A metallic surface is irradiated by a monochromatic light ...

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  13. Energy required for the electron excitation in Li^(++) from the first ...

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  14. After absorbing a slowly moving neutrons of mass m(N) (momentum ~0) a...

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  15. Statement-1: Davisson-Germer experiment established the wave nature of...

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  16. Hydrogen atom is excieted from ground state to another state with prin...

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  17. A diatomic molecule is made of two masses m(1) and m(2) which are sepa...

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  18. The anode voltage of photocellis kept fixed. The wavelength lambda of ...

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  19. In a hydrogen like atom electron make transition from an energy level ...

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  20. Hydrogen (.(1)H^(1)), Deuterum (.(1)H^(2)), singly ionised Hellium (....

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