Question

- What is the frequency of light whose waveler
wency of light whose wavelength is 633 nm? (1 m= 1 x 10 nm)
A
4.74 x 10-2 Hz
B
c
4.74 x 10-4 Hz
4.74 x 1014 Hz
D
4.74 x 1016 Hz

Answer 1

Answer:

Frequency = 4.74 × 10¹⁴ Hz

Explanation:

Given data:

Wavelength of light = 633 nm (633 ×10⁻⁹ m)

Frequency of light = ?

Solution:

Speed of light = wavelength × frequency

Frequency = Speed of light / wavelength

Speed of light = 3 × 10⁸ m/s

Frequency = 3 × 10⁸ m/s / 633 ×10⁻⁹ m

Frequency = 0.00474 × 10¹⁷ s⁻¹

Frequency = 4.74 × 10¹⁴s⁻¹

s⁻¹ = Hz

Frequency = 4.74 × 10¹⁴ Hz