Question

Choose the correct answer.
Wavelength of a typical X-ray is 10-7, and that of FM wave is 102. What is the ratio
of FM wave to X-ray wavelength?​

Answer 1

Answer:

10^9:1 i think it is the correct answer

Answer 2

Given:

The wavelength of a typical X-ray is $10^{-7}$

The wavelength of the FM wave is $10^{2}$

To Find:

The ratio of FM wave to X-ray wavelength

Solution:

As we know the ratio of two numbers is calculated as

a:b = a/b

According to question

The ratio of FM wave to X-ray wavelength

= wavelength of FM wave/wavelength of X-ray wave

=  $10^{2}$/ $10^{-7}$

=$10^{2-(-7)}$  (when in a fraction the exponents get subtracted)

=$10^{9}$:1

Hence, the ratio of FM wave to X-ray wave is $10^{9}$:1.