Question

(a) What is the frequency of violet colourof wavelength `4000 A^@` ?
(b) What is the What is the frequency of red colour of wavelength `8000 A^@` ?

Answer 1

(a) `v = ( c)/(lamda) = (3 xx 10^8)/(4000 xx 10^-10) = 7.5 xx 10^14 Hz`
(b) `v = ( c)/(lamda) = (3 xx 10^8)/(8000 xx 10^-10) = 3.75 xx 10^14 Hz`.