Question

calculate the frequency of yellow light of wavelength 5500 Armstrong

Answer 1

i m taking wavelength as w

frequency f=c/w

where c=speed of light= 3×10^8
w=5500Å=5500×10^-10

f=3×10^8 / 5500×10^-10
f=0.00054×10^18
f=5.4×10^14Hz