Monochromatic light of frequency 6.0 x 10¹⁴ Hz is produced by a laser. The power emitted is 2 x 10^-3 W The number of photons emitted, on the average, by the source per second is:

5 x 10¹⁵

5 x 10⁶

5 x 10¹⁷

5 x 10¹⁴

Solution

5 x 10¹⁵

Photons are the packest of energy.
Power emitted,
P = 2 x 10^-3 W
Energy of photon,
E = hv
= 6.6 x 10^-34 x 6 x 10¹⁴ J
h being Planck's constant
Number of photons emitted per second
n = P/E
= $fraction numerator 2 space straight x space 10 to the power of negative 3 end exponent over denominator 6.6 space straight x space 10 to the power of negative 34 end exponent space straight x space 6 space straight x space 10 to the power of 14 end fraction$
= 5 x 10¹⁵

For Daily Free Study Material Join wiredfaculty

Wave Optics

Monochromatic light of frequency 6.0 x 10¹⁴ Hz is produced by a laser. The power emitted is 2 x 10^-3 W The number of photons emitted, on the average, by the source per second is:

5 x 10¹⁵

5 x 10⁶

5 x 10¹⁷

5 x 10¹⁴

Some More Questions From Wave Optics Chapter

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Phone Number

Email Address

Loaction

For Daily Free Study Material Join wiredfaculty

Wave Optics

Monochromatic light of frequency 6.0 x 1014 Hz is produced by a laser. The power emitted is 2 x 10-3 W The number of photons emitted, on the average, by the source per second is: 5 x 1015 5 x 106 5 x 1017 5 x 1014

Some More Questions From Wave Optics Chapter

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Monochromatic light of frequency 6.0 x 10¹⁴ Hz is produced by a laser. The power emitted is 2 x 10^-3 W The number of photons emitted, on the average, by the source per second is:

5 x 10¹⁵

5 x 10⁶

5 x 10¹⁷

5 x 10¹⁴