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Let (nr) and (nb) be respectively the nu...

Let `(n_r) and (n_b) be respectively the number of photons emitted by a red bulb and a blue blub of equal power in a given time.

A

`n_r = n_b `

B

`n_r lt n_b `

C

`n_r gt n_b `

D

the information is insufficient to get a relation between ` n_r and n_b `

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The correct Answer is:
C
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MOTION-PHOTOELECTRIC EFFECT -EXERCISE-1 (OBJECTIVE QUESTIONS)
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  2. Two photons, each of energy 2.5 eV are simultaneously incident on the ...

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  3. Let (nr) and (nb) be respectively the number of photons emitted by a r...

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  5. The equation E=pc is valid

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  6. The wavelength of a spectral line is 4000 Å. Calculate its frequency a...

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  7. A surface ejects electrons when illuminated by blue light but none wit...

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  8. Electrons of 0.5 eV energy are emitted from a metal surface when ...

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  9. Which metal will be suitable for a photo electric cell using light...

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  10. An electromagnetic radiation of frequency 3xx10^(15) cycles per second...

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  11. The work function of metal is 1 eV. Light of wavelength 3000 Å is inc...

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  12. Two differenct photons of energies, 1 eV and 2.5 eV, fall on two ...

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  13. The KE of the photoelectrons is E when the incident wavelength is (lam...

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  14. The threshold wavelength of tungsten is 2300 Å. If ultra voile...

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  15. If the frequency of light in a photoelectric experiment is doubled the...

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  16. The stopping potential for photo electrons does not depend on

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  17. The work function for the surface of aluminium is 4.2 eV. What will be...

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  18. Light of wavelength 3320 Å incidents on metal surface (work fun...

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  19. Using light of wavelength 6000 Å stopping potential is obtained ...

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  20. When light source is placed at 1 m distant from photo electric...

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