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When light of wavelength 300 nm (nanomet...

When light of wavelength `300 nm` (nanometre) falls on a photoelectric emitter , however light of `600 nm` wavelength is sufficient for creating photoemission . What is the ratio of the work functions of the two emitters ?

A

`1 : 2`

B

`2 : 1`

C

`4 : 1`

D

`1 : 4`

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The correct Answer is:
B
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