Assertion: Electrons are ejected from a certain metal when either blue or violet light strikes the metal surface. However only violet light cause electron ejection from a second metal.
Reason: The electrons in the first metal requires less energy for ejection.

Options

A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
C. Assertion is true but Reason is false
D. Assertion is false but Reason is true

Answer

A

Explanation

Violet or blue light have maximum energy in visible ray. If form element first, ejection of electrons are possible even with other colour of light then it can eject electrons in lower energy of light also . But for second element it can eject its photoelectron in violet light means it requies high energy (high threshold energy )