Concept explainers
A red light was shined onto a metal sample and the result shown in (i) was observed. When the light source was changed to a blue light the result shown in(ii) was observed. Explain how these results can be interpreted with respect to the
Describe the result you would expect for each of the following: (a) The intensity of red light is increased. (b) The intensity of blue light is increased. (c) Violet light is used.
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