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The threshold wave length for photo elec...

The threshold wave length for photo electric emission from a material is `5,200A^(@)`, photo electrons will be emitted when this material is illuminated with monochromatic radiation from а

A

50 watt infrared lamp

B

1 watt infrared lamp

C

1 watt ultraviolet lamp

D

50 watt sodium vapour lamp

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-DUAL NATURE OF RADIATION AND MATTER-EXERCISE=II
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  2. Photons of wavelength 660 nm are emitted from a 60 watt lamp. What is ...

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  3. The threshold wave length for photo electric emission from a material ...

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  4. In a photo electric experiment, photon of energy 5 eV are incident on ...

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  5. Light of wavelength 5000^(@)A falls on a sensitive plate with photo el...

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  6. The energies of the incident photons are 3, 4, 5 eV. The work function...

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  7. Radiations of two different frequencies whose photon energies are 3.4 ...

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  8. Sodium and copper have work functions 2.3eV and 4.5eV respectively, th...

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  9. A graph is drawn between stopping potential (y-axis) and incident freq...

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  10. A photo cell is illuminated by a small bright source placed (1)/(2) m ...

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  11. A photon incident on a metal of photo electric work function 2 ev prod...

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  12. For a certain metal the threshold frequency is v(0). If light of frequ...

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  13. In a photoelectric cell, current stops when a negative potential of 0....

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  14. The K.E. of photo electron ejected from a metal surface by light of wa...

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  15. The work function of potassium is 2.0 eV. When it is illuminated by li...

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  16. Photo electric emission is observed from a metallic surface for freque...

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  17. When radiation of the wavelength lamdais incident on a metallic surfac...

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  18. K(1) and K(2) are the maximum kinetic energies of the photo electrons ...

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  19. Light of frequency 1.5 times the threshold frequency is incident on a ...

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  20. The maximum wavelength of a beam of light can be used to produce photo...

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