A photon of 1.7 × {10^{ - 13}} Joules is absorbed by a material under special circumstances. correc

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11.Dual Nature of Radiation and matter

easy

A photon of $1.7 \times {10^{ - 13}}$ Joules is absorbed by a material under special circumstances. The correct statement is

A

Electrons of the atom of absorbed material will go the higher energy states

B

Electron and positron pair will be created

C

Only positron will be produced

D

Photoelectric effect will occur and electron will be produced

Solution

(b)For electron and positron pair production, minimum energy is $1.02\ MeV$.

Energy of photon is given $1.7 ×10-3 J$ $ = \frac{{1.7 \times {{10}^{ – 13}}}}{{1.6 \times {{10}^{ – 19}}}}$

$= 1.06 \ MeV$.

Since energy of photon is greater than $1.02 \ MeV,$

So electron, positron pair will be created.

Standard 12

Physics

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