Question

A light wave travels at a speed of 3.0 * 108 meters/second. If the wavelength is 7.0 x 10-7 meters, what is the freq

2.5 x 10-14 hertz
B. 4.3 * 1014 hertz
C.
1.7 * 10-14 hertz
D.
5.1 x 10-14 hertz

Answer 1

B = Frequency = 4.3 × 10¹⁴Hz

Step-by-step explanation:

Given data:

Speed of light = 3 × 10⁸ ms⁻¹

Wavelength of light = 7.0 × 10⁻⁷ m.

Frequency = ?

Solution:

Formula:

Speed of light = wavelength × frequency

Frequency = Speed of light /wavelength

Frequency = 3 × 10⁸ ms⁻¹ /7.0 × 10⁻⁷ m.

Frequency = 0.43 × 10⁸⁺⁷ s⁻¹

Frequency = 0.43 × 10¹⁵s⁻¹

s⁻¹ = Hz

Frequency = 4.3 × 10¹⁴Hz