Photo electric emission can occur only if - Electronic Devices and Circuits

Electronics and Communication Engineering (ECE) : Electronic Devices and Circuits - Quiz(MCQ)

Photo electric emission can occur only if

wave length of incident radiation is less than threshold value

wave length of incident radiation is equal to threshold value

frequency of incident radiation is less than threshold frequency

None of the above

Correct Answer : Option (A) : wave length of incident radiation is less than threshold value

Explanation : The frequency of incident radiation has to be more than threshold value. Wavelength is inversely proportional to frequency.

Therefore wavelength of incident radiation must be less than threshold value.

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