Physics · Photoelectric Effect
When radiation of wavelength λ is incident on a metallic surface, the stopping potential required is 4.8 V. If the same surface is illuminated with radiation of double the wavelength, the required stopping potential becomes 1.6 V. The threshold wavelength for the surface is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 12λ
- 24λ✓
- 36λ
- 48λ
Correct answer
4λ
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