A radar transmitter generates waves of frequency 3 × 10 9 Hz . What is the wavelength ?

We know that, c = λ ν , here c is speed of light. ⇒ λ = c / ν = 3 × 10 8 3 × 10 9 = 0 . 1 m λ = 0 . 1 m = 10 cm

E M B I B E

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 13 - Electromagnetic Waves>QUESTIONS>Q 14

EASY

12th ICSE

IMPORTANT

Earn 100

State any two properties of microwaves.

Important Questions on Electromagnetic Waves

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 13 - Electromagnetic Waves>QUESTIONS>Q 1

Arrange all the seven types of electromagnetic radiations in increasing order of their frequencies. (You must begin with a radiation with the lowest frequency and end with the one having the highest frequency). State how electric vector

\vec{E}

, magnetic vector

\vec{B}

and velocity vector

\vec{C}

are oriented in an electromagnetic wave.

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 13 - Electromagnetic Waves>QUESTIONS>Q 2

Describe, with the help of a diagram, the electromagnetic spectrum from gamma rays to radio waves, showing approximate wavelength ranges.

MEDIUM

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 13 - Electromagnetic Waves>QUESTIONS>Q 3

Describe very briefly any four regions of electromagnetic spectrum, mentioning their special properties/features.

MEDIUM

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 13 - Electromagnetic Waves>QUESTIONS>Q 4

Electromagnetic spectrum is commonly classified as gamma rays, X-rays, UV-rays, visible light, IR-rays, etc. Mention very briefly two special features of any three of these, with respect to their production (source) and properties.

MEDIUM

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 13 - Electromagnetic Waves>QUESTIONS>Q 1

Electromagnetic waves enter a medium of relative permeability