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Question
When the blue light falls onto a certain metal, no electrons are ejected. Identify which of the following lights might eject electrons from the metal?
When the blue light falls onto a certain metal, no electrons are ejected. Identify which of the following lights might eject electrons from the metal?
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Solution
The correct option is E Ultraviolet
On the incidence of blue light , no electron is emitted from metal , it means frequency of blue light is smaller than the threshold frequency of the metal . As out of all the given lights , Ultraviolet light has frequency greater than blue , therefore it might emit electrons from the metal.
On the incidence of blue light , no electron is emitted from metal , it means frequency of blue light is smaller than the threshold frequency of the metal . As out of all the given lights , Ultraviolet light has frequency greater than blue , therefore it might emit electrons from the metal.
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