CAPE Physics Unit 2 · 2009 · Paper 1 · Question Q31
Light falls on a photoelectric material and no electrons are emitted. Electrons may be emitted if which of the following is/are increased? I. The intensity of the light II. The frequency of the light III. The wavelength of the light
- (A)I only
- (B)II only
- (C)III only
- (D)I and III only
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