CAPE Physics Unit 2 · 2018 · Paper 1 · Question Q32
Light falls on a photoelectric material and no electrons are emitted. Electrons may be emitted if which of the following properties of the light is/are decreased? I. Intensity II. Frequency III. Wavelength
- (A)II only
- (B)III only
- (C)I and II only
- (D)I and III only
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