Question

Infrared radiation has wavelengths ranging
from about 800 nm to 1 mm. What is the
frequency of radiation of wavelength 990 nm?
Answer in units of s−1
.
Determine the frequency of light with a wavelength of 3.637 × 10−7
cm.
Answer in units of Hz.

Answer 1

1 Hz = 1 s^-1

с/λ = ν

1) (2.99*10⁸)/(990*10^-9) = 3.03*10¹⁴ s^-1

2) (2.99*108)/(3.637*10^-7) = 8.24*10¹⁴ Hz