S C Kheterpal, S N Dhawan and, P N Kapil Solutions for Chapter: Structure of Atom, Exercise 2: PROBLEMS FOR PRACTICE

Calculate the frequency of infrared radiations having wavelength, $3\times {10}^6\mathrm{}\mathrm{n}\mathrm{m}.$

Calculate the range of frequencies of visible light from $3800-7600\mathrm{}\mathrm{Å}.$

How long would it take a radio wave of frequency, $6\times {10}^3 {\sec }^{-1}$to travel from Mars to the Earth, a distance of $8\times {10}^7 \mathrm{k}\mathrm{m}?$

Calculate the wave number of radiations having a frequency of $4\times {10}^{14}\mathrm{}\mathrm{H}\mathrm{z}.$

A particular radio station broadcasts at a frequency of $1120 \mathrm{k}\mathrm{H}\mathrm{z} \left(\mathrm{k}\mathrm{i}\mathrm{l}\mathrm{o}\mathrm{h}\mathrm{e}\mathrm{r}\mathrm{t}\mathrm{z}\right).$ Another radio station broadcasts at a frequency of $98.7 \mathrm{M}\mathrm{H}\mathrm{z} \left(\mathrm{M}\mathrm{e}\mathrm{g}\mathrm{a}\mathrm{h}\mathrm{e}\mathrm{r}\mathrm{t}\mathrm{z}\right).$ What are the wavelengths of the radiations from each station?