How many photons are emitted by a bulb of 100W in 20 seconds if wavele

1.	How many photons are emitted by a bulb of 100W in 20 seconds if wavelength 6600 A°
Answer» Answer: E = n H C / L E = Energy = Power * Time = 2000 J h = Plank 's constant = 6.67 * 10^-34 J s c = speed of light = 3 * 10^8 m/s L = wavelength = 66 * 10^-8 m n = no. of PHOTONS After putting all these values , n = 6.6 * 10^21 I hope it helps .

How many photons are emitted by a bulb of 100W in 20 seconds if wavelength 6600 A°

Answer»

Answer:

E = n H C / L

E = Energy = Power * Time = 2000 J

h = Plank 's constant = 6.67 * 10^-34 J s

c = speed of light = 3 * 10^8 m/s

L = wavelength = 66 * 10^-8 m

n = no. of PHOTONS

After putting all these values ,

n = 6.6 * 10^21

I hope it helps .