Question

The value of Planck's constant is 6.63 × 10⁻³⁴ Js. The velocity of
light is 3.0 × 10⁸ m s⁻¹. Which value is closest to the wavelength in
nanometers of a quantum of light with frequency of 8 × 10¹⁵ s⁻¹ ?
(a) 3 × 10⁷ (b) 2 × 10⁻²⁵ (c) 5 × 10⁻¹⁸ (d) 4 × 10¹

Answer 1

YOUR ANSWER IS IN THE ATTACHMENT PLZZ REFER TO THE ATTACHMENT

Answer 2

(d) 4 × 10¹

Explanation:

Frequency = speed of light/ wavelength

 So wavelength = 3 * 10^8 / 8 * 10^15 = 0.375 * 10^-7 = 3.75 * 10^1nm

So 4 * 10^1 is the closest value to the wavelength of a quantum of light with frequency 8 * 10^15.

Option D is the answer.