Question

Calculate the wavelength λ1 for gamma rays of frequency f1 = 7.50×1021 hz .

Answer 1

Gamma rays are in class of  electromagnetic waves and therefore has the  same speed equal to that of light, that is, 3x10^ m/s

Wavelength = speed/frequency = (3x10^8)/(7.50x10^21) = 4x10^-14 m

Answer 2

Explanation :

Frequency of gamma rays, $\nu=7.5\times 10^{21}\ Hz$

The relation between the frequency and the wavelength is given by :

$\lambda=\dfrac{c}{\nu}$

So, $\lambda=\dfrac{3\times 10^8\ m/s}{7.5\times 10^{21}\ Hz}$

$\lambda=4\times 10^{-14}\ m$

Hence, this is the wavelength of gamma rays.