The wavelength of the blue light given off by a mercury vapor street lamp is 436 nm. What is the energy of this light in joules? A)4.56 × 10⁻²⁸ J B)4.56 × 10⁻¹⁹ J C)8.67 × 10⁻³² J D)8.67 × 10⁻²³ J E)9.63 × 10⁻⁴⁰ J

Question

Quizplus · Accepted Answer

The energy of light can be calculated using the equation E = hc/λ, where h is Planck's constant (6.626 x 10^-34 J·s), c is the speed of light (3.00 x 10^8 m/s), and λ is the wavelength in meters. Converting 436 nm to meters (436 x 10^-9 m) and substituting the values, we get E ≈ 4.56 x 10^-19 J.

The Wavelength of the Blue Light Given Off by a Mercury