KCET 2025 | Electromagnetic Waves Question 1 | Physics

$$ \begin{array}{|l|l|} \hline \text { Waves } & \text { Wavelength ranges } \\ \hline \text { i. Microwave } & \text { a. } 700 \mathrm{~nm} \text { to } 400 \mathrm{~nm} \\ \hline \text { ii. Visible light } & \text { b. } 1 \mathrm{~nm} \text { to } 10^{-3} \mathrm{~nm} \\ \hline \text { iii. Ultraviolet } & \text { c. } 0.1 \mathrm{~m} \text { to } 1 \mathrm{~mm} \\ \hline \text { iv. X-rays } & \text { d. } 400 \mathrm{~nm} \text { to } 1 \mathrm{~nm} \\ \hline \end{array} $$

i-c, ii-a,iii-d, iv-b

i-d, ii-b, iii-c, iv-a

i-b, ii-c, iii-a, iv-d

i-a, ii-d, iii-b, iv-c

KCET 2025

MCQ (Single Correct Answer)

-0

The total energy carried by the light wave when it travels from a rarer to a non-reflecting and nonabsorbing medium

remains same

increases

either increases or decreases depending upon angle of incidence

decreases

KCET 2024

MCQ (Single Correct Answer)

-0

Electromagnetic waves are incident normally on a perfectly reflecting surface having surface area $A$. If $I$ is the intensity of the incident electromagnetic radiation and $c$ is the speed of light in vacuum, the force exerted by the electromagnetic wave on the reflecting surface is

$2 I A / c$

$L A / C$

$I A / 2 c$

$I / 2 A c$

KCET 2023

MCQ (Single Correct Answer)

-0

The ratio of the magnitudes of electric field to the magnetic field of an electromagnetic wave is of the order of

10$$^{-8}$$ ms$$^{-1}$$

10$$^{5}$$ ms$$^{-1}$$

10$$^{-5}$$ ms$$^{-1}$$

10$$^{8}$$ ms$$^{-1}$$

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