Answer:
b) The Energy Output is 4.50e-16 J/s
Explanation:
From Plank's Law:
E = n h υ
where,
E = Total Energy
n = No. of Photons = 324 /sec
h = 6.63 x 10⁻³⁴ J.sec
υ = frequency of light = speed of light / Wavelength
υ = (2.998 x 10⁸ m/s)/(143 x 10⁻⁹ m)
υ = 2.096 x 10¹⁵ /sec
Therefore,
E = (324 /sec)(6.63 x 10⁻³⁴ J.sec)(2.096 x 10¹⁵ /sec)
E = 45.03 x 10⁻¹⁷ J/s
E = 4.50 x 10⁻¹⁶ J/s
Hence, the correct answer is:
b) The Energy Output is 4.50e-16 J/s
