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A beam of monochromatic light of wavelen...

A beam of monochromatic light of wavelength `lambda` ejects photoelectronic from a cesium surface `(W_(0)=1.9 eV)` which are made to collide with hydrogen atoms in ground state. The maximum value of `lambda` for which hydrogen atoms may be ionised is

A

0.77 nm

B

7.7 nm

C

77 nm

D

770 nm

Text Solution

Verified by Experts

The correct Answer is:
C
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