Question

8.
4. Threshold wavelength for photoelectric emission
in tungsten is 230 nm. The wavelength of light that
must be used in order for electrons with maximum
energy of 1.5 eV to be ejected is:
(a) 120 nm
(b) 130 nm
(c) 180 nm
(d) 200 nm​

Answer 1

option = 130

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