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Light of wavelength lambda strikes a pho...

Light of wavelength `lambda` strikes a photo - sensitive surface and electrons are ejected with kinetic energy is to be increased to `2 E` , the wavelength must be changed to `lambda'` where

A

` ( lamda ) /(2) lt lamda' lt lamda `

B

` lamda ' gt lamda `

C

`lamda ' = (lamda )/(2)`

D

`lamda ' lt (lamda ) /(2)`

Text Solution

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The correct Answer is:
D
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MOTION-PHOTOELECTRIC EFFECT -EXERCISE-2 (OBJECTIVE QUESTIONS (NEET))
  1. Photoelectric effect takes place in element A. Its work function is 2....

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  2. Surface of sodium is illuminated by a light of 6000 Å wavelength....

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  3. The energy of a photon corresponding to the visible light of maximum w...

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  4. Choose the correct option for the graph between the frequency of incid...

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  5. The maximum kinetic energy of photoelectrons emitted from a surface w...

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  6. The strength of photoelectric current is directly proportional ...

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  7. When light falls on a photosensitive surface, electrons are emitted fr...

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  8. The frequency of incident light falling on a photosensitive metal plat...

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  9. When light of wavelength lesser than 6000 Å is incident on a me...

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  10. The work function of a substance is 4.0 eV. The longest wavelength of ...

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  11. The kinetic energy of most energetic electrons emitted from a metallic...

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  12. In a photoelectric effect experiment, the graph between the stopping p...

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  13. A photon of energy E ejects a photoelectron from a metel surface whose...

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  14. A radio transmitter operates at a frequency of 880 kHz and a power of ...

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  15. A photon of energy 8 eV is incident on a metal surface of threshold fr...

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  16. Light of wavelength lambda strikes a photo - sensitive surface and ele...

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  17. Maximum velocity of photoelectrons emitted by a metal surface is 1.2xx...

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