The wavelength of light in the visible region is about 390 nm for violet colour. The energy of photons in (eV) is:
(Take \(h=6.63\times 10^{-34}~\mathrm{Js}\) and \(1\mathrm{eV}=1.6\times 10^{-19}~\mathrm{J}\))


1. 1.64 eV
2. 2.26 eV
3. 3.19 eV
4. 4.03 eV

Subtopic:  Photoelectric Effect: Experiment |
 74%
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NEET 2023 - Target Batch - Aryan Raj Singh
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The wavelength of light in the visible region is about \(550\) nm (average wavelength) for yellow-green colour. Three materials with work functions are given as Al (\(4.28\) eV), Cu (\(4.65\) eV) and Na (\(2.75\) eV). From which of these photosensitive materials, can you build a photoelectric device that operates with visible light?
1. Al
2. Cu
3. Na
4. none of the above

Subtopic:  Photoelectric Effect: Experiment |
 52%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh