The wavelength of 10^15-hz light is:
a. 300 m
b. 300 mm
c. 300 micro-m
d. 300 nm

D.300nm

Explanation:

Wavelength = Speed of light / Frequency of light

where the speed of light is...(3 × 10^8)

Wavelength = (3 × 10^8)/(1 × 10^15)

Wavelength = 3 × 10^-7

;Wavelength = 300 × 10^-9

Hence its300 nm

frequency or wavelenth of em radiation in a vacuum

d. air pressure decreases as altitude increases.