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Ultraviolet light of wavelengths lambda(...

Ultraviolet light of wavelengths `lambda_(1)` and `lambda_(2)` when allowed to fall on hydrogen atoms in their ground state is found to liberate electrons with kinetic energy `1.8 eV` and `4.0 eV` respectively. Find the value of `(lambda_(1))/(lambda_(2))`.

A

`(7)/(8)`

B

`(8)/(7)`

C

`(9)/(20)`

D

`(20)/(9)`

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The correct Answer is:
B
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RESONANCE-ATOMIC PHYSICS-Exercise (2) Only one option correct type
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