The threshold wavelength for photoelectric emission from a material is 5500 $\mathop A\limits^o $. Photoelectrons will be emitted, when this material is illuminated with monochromatic radiation from a A. 75 W infra-red lamp B. 10 W infra-red lamp C. 75 W ultra-violet lamp D. 10 W ultra-violet lamp Choose the correct answer from the options given below :

Question

The threshold wavelength for photoelectric emission from a material is 5500 $\mathop A\limits^o $. Photoelectrons will be emitted, when this material is illuminated with monochromatic radiation from a

A. 75 W infra-red lamp

B. 10 W infra-red lamp

C. 75 W ultra-violet lamp

D. 10 W ultra-violet lamp

Choose the correct answer from the options given below :

C only

A and D only

C and D only

B and C only

Solution

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