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# brighteness depend on frequency but ejection of electron does not depend on frequency why?     main difference between frequency and intensity

Asked by SaLman 9th March 2017, 6:09 PM

Hi Salman,

Brightness depends on the number of electrons hitting the screen per area. So, it is frequency dependent. Ejection of electrons is also dependent on the frequency. It is called the threshold frequency. So, both are frequency dependent.

Answered by Expert 9th March 2017, 6:25 PM

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