The number of photons frequency 1014 Hz in radiation of 6.62 Joule wil

1.	The number of photons frequency 1014 Hz in radiation of 6.62 Joule will be A) 1010B) 1015 C) 1020 D) 1025
Answer» The correct option is C) 10²⁰ Since E = hv Where E = Energy h = Planck’s constant and v = frequency. Given; E = 6.62 J v = 10¹⁴ Hz Let the no. of photons be x. =) E = (x) x (hv) =) 6.62 = (x) x (6.62 x 10^-34 Js) x 10¹⁴ =) 6.62/6.62 = (x) x (10^-20) =) 1 = (x) x (1)/ 10²⁰ =) 1020 = x.

The number of photons frequency 1014 Hz in radiation of 6.62 Joule will be A) 1010B) 1015 C) 1020 D) 1025

Answer»

The correct option is C) 10²⁰

Since E = hv

Where E = Energy

h = Planck’s constant and v = frequency.

Given;

E = 6.62 J

v = 10¹⁴ Hz

Let the no. of photons be x.

=) E = (x) x (hv)

=) 6.62 = (x) x (6.62 x 10^-34 Js) x 10¹⁴

=) 6.62/6.62 = (x) x (10^-20)

=) 1 = (x) x (1)/ 10²⁰

=) 1020 = x.