Question: Q. 9. An EM wave, $Y_{1}$, has a wavelength of $1 \mathrm{~cm}$ while another EM wave, $Y_{2}$, has a frequency of $10^{15} \mathrm{~Hz}$. Name these two types of waves and write one useful application for each.
$\mathrm{R}$ [Foreign 2016]
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Solution:
Ans. $Y_{1}$ Microwaves
$1 / 2$
Microwave oven, Aircraft Navigator or any other
$Y_{2}$ Ultraviolet waves
$1 / 2$
Sterilize surgical instruments, food preservation or any other
[CBSE Marking Scheme 2016]
Short Answer Type Questions-II
(3 marks each)
