Question

If an electromagnetic wave has a frequency of 4.5 x 1018 Hz, what is its

wavelength? Use î=”. The speed of light is 3 * 108 m/s.
A. 1.5 x 10-26
B. 6.7 x 1026 m
C. 1.5 x 10-10 m
D. 6.7 * 10-11 m

Answer 1

Wavelength of electromagnetic wave = 6.7 × 10⁻¹¹

Step-by-step explanation:

Given:

Frequency of electromagnetic wave = 4.5 × 10¹⁸ Hz

Speed of light = 3 × 10⁸ m/s

Find:

Wavelength of electromagnetic wave

Computation:

⇒ Wavelength = Speed of light / Frequency

⇒ Wavelength of electromagnetic wave = 3 × 10⁸ / 4.5 × 10¹⁸

⇒ Wavelength of electromagnetic wave = 0.67 × 10⁻¹⁰

Wavelength of electromagnetic wave = 6.7 × 10⁻¹¹