Gamma Question Bank for Medical Physics>Chapter 23 - Electromagnetic Waves>Assignment>Q 26

EASY

NEET

IMPORTANT

Earn 100

The R.M.S. value of an electric field of the light coming from the sun is $720 N C^{- 1}$ . Calculate the average total energy density of the electromagnetic wave.

Important Questions on Electromagnetic Waves

MEDIUM

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 23 - Electromagnetic Waves>Assignment>Q 27

What is microwave oven? Explain its principle of working,

HARD

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 23 - Electromagnetic Waves>Assignment>Q 28

What does an electromagnetic wave consists of? On what factors does its velocity in vacuum depend?

MEDIUM

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 23 - Electromagnetic Waves>Assignment>Q 29

Write the order of frequency range and one use of each of the following electromagnetic radiation.
(i) Radiowaves
(ii) Ultraviolet rays
(iii) Gamma rays

MEDIUM

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 23 - Electromagnetic Waves>Assignment>Q 30

Suppose that the electric field amplitude of an electromagnetic wave is

E_{0} = 120 N C^{- 1}

and its frequency is

50 MHz

.
(i) Determine

B_{0}, ω, k

and

λ

.
(ii) Write expression for

\vec{E}

and

\vec{B}

.

MEDIUM

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 23 - Electromagnetic Waves>Assignment>Q 31

Find the energy stored in a

90 cm

length of a laser beam operating at

10 mW

.

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 23 - Electromagnetic Waves>Assignment>Q 32

Experimental observations have shown that

x

-rays
(i) Travel in vacuum with a speed of

3 \times 10^{8} m s^{- 1}

(ii) Shows the phenomena of diffraction and can be polarised.
What conclusion is drawn about the nature of

X

-rays from each of these observations?

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 23 - Electromagnetic Waves>Assignment>Q 33

The following table gives the wavelength range of some constituents of the electromagnetic spectrum. Select the wavelength range and name the electromagnetic waves that are
(i) Widely used in the remote switches of household electronic devices.
(ii) Produced in nuclear reactions.