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For alkali metals threshold frequencies ...

For alkali metals threshold frequencies lie in which region?

A

Ultraviolet

B

Visible

C

X-rays

D

None of these

Text Solution

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The correct Answer is:
B
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KUMAR PRAKASHAN-DUAL NATURE OF RADIATION AND MATTER-Section-D (multiple choice questions (MCQs)
  1. Frequency of radiation incident on metal surface is called threshold f...

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  2. For most of metals threshold frequency lies in which region of electro...

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  3. For alkali metals threshold frequencies lie in which region?

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  4. For photosensitive surface threshold wavelength is 5200Å .When monochr...

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  5. Electrons are emitted from photo-cell with maximum speed of 4xx10^(8) ...

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  6. Radiation of 4f(0) frequency is incident on metal surface with f(0) th...

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  7. Work function of metal is phi wavelength of incident light is lambda.W...

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  8. Four photon of lambda gt lambda(0) are incident on metal surface ……..p...

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  9. If ratio of threshold frequencies of two metals is 1:3 ,ratio of their...

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  10. When a piece of sodium or potassium are exposed to sunlight ……..

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  11. If photo-electric effect is not seen with the ultraviolet radiation in...

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  12. Threshold wavelength of metal is 30 Å If radiation of 2000Å Is inciden...

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  13. Work function of metal A,B and C are 4.5 eV 4.3 eV and 3.8eV respectiv...

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  14. What will be maximum value of wavelength by which photo-electric emiss...

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  15. A metal surace objects electrons when hit by green light but none when...

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  16. Photo-electric emission is observed from a metalli surface for frequen...

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  17. If photo-electric effect,when frequency of incident radiation is doubl...

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  18. For metals cesium ,potassium ,sodium and lithium graph of stopping pot...

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  19. Maximum kinetic energy of photoelectron emitted is independent of ……

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  20. In two different experiment X-rays are incident on sodium metal and th...

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