Recent questions tagged contemporary physics

+3 votes

1 answer

Distinguish between amplitude modulation and frequency modulation.

asked Apr 5, 2019 in Physics by kratos

+2 votes

1 answer

Give three reasons why modulation of a message signal is necessary for long distance transmission.

asked Mar 30, 2019 in Physics by kratos

+1 vote

1 answer

Write any four characteristics of electromagnetic waves.

asked Mar 30, 2019 in Physics by kratos

+1 vote

1 answer

Out of the following options which one can be used to produce a propagating electromagnetic wave?

asked Mar 30, 2019 in Physics by kratos

+1 vote

1 answer

Speed of electromagnetic waves is the same (a) for all wavelengths

asked Mar 29, 2019 in Physics by kratos

+3 votes

1 answer

The power radiated by the sun is 3.8 × 10^26 W; the average distance between the sun and the earth is 1.5 × 1011 m,

asked Mar 16, 2019 in Physics by kratos

+1 vote

1 answer

For an amplitude wave, the maximum amplitude is found to be 12V while the minimum the amplitude is 2V.

asked Mar 13, 2019 in Physics by kratos

+2 votes

1 answer

How are infrared waves produced? Why are these referred to as heat waves? Write their one important use?

asked Mar 8, 2019 in Physics by kratos

+3 votes

1 answer

For propagation of radiowaves the mode used is/are :

asked Feb 25, 2019 in Physics by kratos

+1 vote

1 answer

Radio waves differ from visible light waves in that radio waves: A. travel slower

asked Feb 24, 2019 in Physics by kratos

+3 votes

1 answer

Give the short note on Infrared waves.

asked Feb 22, 2019 in Physics by kratos

+1 vote

1 answer

Describe some examples observed in nature of Nanotechnique.

asked Feb 20, 2019 in Physics by kratos

+3 votes

1 answer

Electromagnetic waves does not possess : (a) energy (b) charge (c) momentum (d) information

asked Feb 12, 2019 in Physics by kratos

+3 votes

1 answer

The dimensional formula of energy density is

asked Feb 9, 2019 in Physics by kratos

+3 votes

1 answer

u200b The vibration of E of an electromagnetic wave propagating in X-direction are parallel to Y-axis. u200b

asked Feb 5, 2019 in Physics by kratos

+3 votes

1 answer

Name the part of the electromagnetic spectrum of wavelength 10^-2 m and mention its one application.

asked Feb 1, 2019 in Physics by kratos

+3 votes

1 answer

Average energy density radiated in electromagnetic wave is related to:

asked Jan 28, 2019 in Physics by kratos

+2 votes

1 answer

The index of refraction of a substance is: A. the speed of light in the substance

asked Jan 22, 2019 in Physics by kratos

+2 votes

1 answer

A plane electromagnetic harmonic wave of frequency 600 × 10^12 Hz, propagating in the positive x-direction

asked Jan 22, 2019 in Physics by kratos

+2 votes

1 answer

Which radiation has least wavelength? (a) X-ray (b) γ-ray (c) β-ray (d) α-ray

asked Jan 20, 2019 in Physics by kratos

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