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The threshold wavelength for lithium is ...

The threshold wavelength for lithium is 5250 `Å.` For photoemission to take place, the wavelength of the incident light must be

A

more than 5250 `Å`

B

exactly equal to 5250 `Å`

C

equal to or more than 5250 `Å`

D

equal to or less than 5250 `Å`

Text Solution

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The correct Answer is:
D
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TARGET PUBLICATION-ELECTRONS AND PHOTONS-Critical thinking
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