EASY
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Compared to infrared light, microwaves has lesser frequency.

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Important Questions on Patterns

MEDIUM
The waves used by artificial satellites for communication purposes are
MEDIUM
An electromagnetic radiation is used for photography in fog.
(i) Identify the radiation.
(ii) Why is this radiation mentioned by you, ideal for this purpose?                                                       
EASY
The frequencies of X-rays, γ-rays and ultraviolet rays are respectively a,b and c. Then
EASY
The ratio of contributions made by the electric field and magnetic field components to the intensity of an EM wave is
EASY
Which gaseous element takes part in ozone layer formation?
EASY
Radio waves with frequencies higher than television signals are
EASY
Earth's atmosphere is richest in 
EASY
Which of the following rays has maximum frequency?
EASY
Ozone in the stratosphere is depleted by
MEDIUM
The energy of the em waves is of the order of 15 keV. To which part of the spectrum does it belong ?
 
EASY
If E and B represent electric and magnetic field vectors of the electromagnetic wave, the direction of propagation of electromagnetic wave is along
EASY
The radio waves for frequency 30 MHz to 300 MHz belong to
EASY

The radio waves of frequency $300\, \mathrm{MHz}$ to $3000\,\rm{MHz}$ belong to

EASY
Instruments used for listening to the murmuring in the universe
EASY
A direct X-ray photograph of the intestines is not generally taken by radiologists because
EASY
A linearly polarized electromagnetic wave given as E=E0i^coskz-ωt is incident normally on a perfectly reflecting infinite wall at z=a. Assuming that the material of the wall is optically inactive, the reflected wave will be given as
EASY
The energy of gamma ( γ ) ray photon is Eγ and that of an X-ray photon is Ex. If the visible light photon has energy of Ev , then we can say that 
 
HARD
Three observers A, B and C measure the speed of light coming from a source to be vA, vB and vC. The observer A moves towards the source and C moves away from the source at the same speed. The observer B stays stationary. Suppose the surrounding medium is water everywhere. Select the correct option(s) from the list given in that question.
EASY
The AM range of the radio waves has a frequency of
EASY
Waves related to telecommunication are: