Calculate the energy of a photon with a wavelength of 700 nm.(h = 6.63 × 10-³⁴ J s and c = 3.00 × 10⁸ m s-¹)
A)2.8 × 10-²⁸ J
B)2.8 × 10-¹⁹ J
C)1.3 × 10-²² J
D)3.6 × 10¹⁸ J

Question

Quizplus · Accepted Answer

The formula to calculate the energy of a photon is E = hc/λ, where h is Planck's constant, c is the speed of light, and λ is the wavelength of the photon.

Plugging in the given values, we get:

E = (6.63 × 10^-34 J s)(3.00 × 10^8 m s^-1)/(700 × 10^-9 m)
E = 2.85 × 10^-19 J

Therefore, the energy of the photon is 2.8 × 10^-19 J, and the best choice is B.

Calculate the Energy of a Photon with a Wavelength of 700