EASY
Earn 100

List the uses of gamma radiation.

Important Questions on Patterns

EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
Why are infra-red waves often called heat waves ? Explain.
MEDIUM
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
Which of the following statements is false?
EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
Name the electromagnetic radiations used for eye surgery.
EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
A carrot looks orange in colour because of the β carotene molecule in it. This means that the β carotene molecule absorbs light of wavelengths,
HARD
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
The correct representation of wavelength intensity relationship of an ideal black body radiation at two different temperatures T1 and T2 is
EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
In visible light wavelength of _____ colour is minimum. 
MEDIUM
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
Which mode of propagation is used by short wave broadcast services ?
EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light

Name the portion of the electromagnetic spectrum in between ultraviolet and infrared regions.

EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light

Consider the following
(i) Submarine communications
(ii) A.M. radio
(iii) Shortwave ratio
(iv) Radar

Arrange the above in increasing frequency of the waves associated with them

EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
The speed of X-rays is the same as that of visible light. Hence its wavelength is
EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light

Write the following radiations in the ascending order of their frequencies :

Microwaves, Ultraviolet rays, X-rays and infrared rays.

MEDIUM
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
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
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light

State any one use of infrared radiations.

EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
The order of wavelength of visible rays is
EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light

State any one source of ultraviolet radiations.

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Physics>Relationships>Patterns>Electromagnetic Spectrum of Light

Write the following radiations in the ascending order of their wavelengths:

Microwaves, Ultraviolet rays, Gamma rays, Infrared rays

EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
How Gamma Rays are produced? Write its two important uses. 
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Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery.
EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
The E.M. wave with shortest wavelength among the following is
EASY
Physics>Relationships>Patterns>Electromagnetic Spectrum of Light
The energy of the em waves is of the order of 15 keV. To which part of the spectrum does it belong?