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Recent questions tagged spectrum
+2
votes
1
answer
What is the ratio of velocities of light rays of wavelengths 4000 and 8000 in vacuum?
asked
Apr 6, 2019
in
JEE
by
kratos
electromagnetic waves
spectrum
jee
class-10
icse
jee mains
class-12
+3
votes
1
answer
Why do the distant hills appear blue? Explain.
asked
Apr 4, 2019
in
Class 10
by
kratos
electromagnetic waves
class-10
spectrum
icse
+2
votes
1
answer
What characteristic property of light is responsible for the blue colour of the sky?
asked
Apr 4, 2019
in
Class 10
by
kratos
spectrum
class-10
icse
spectrum of light
+3
votes
1
answer
In the diagram a narrow beam of white light is incident on a right angled isosceles prism.
asked
Apr 3, 2019
in
Class 10
by
kratos
spectrum
electromagnetic waves
class-10
icse
the human eye and the colourful world
+3
votes
1
answer
Infra red radiations are used as signals during war. Explain.
asked
Apr 2, 2019
in
Class 10
by
kratos
spectrum
class-10
icse
+2
votes
1
answer
What is meant by 'Dispersion of light' ?
asked
Mar 31, 2019
in
Class 10
by
kratos
light
cbse
class-8
electromagnetic waves
spectrum
class-10
icse
the human eye and the colourful world
+3
votes
1
answer
Rock salt prism is used instead of glass prism to obtain the infra red spectrum. Give reason.
asked
Mar 30, 2019
in
Class 10
by
kratos
spectrum
class-10
icse
electromagnetic waves
+2
votes
1
answer
The wavelength of red colour is 7 x 10^-7 m and that of blue colour is 4 x 10^-7 m. Will the speed of both the colours be the same in
asked
Mar 23, 2019
in
Class 12
by
kratos
neet
spectrum
spectrum of light
class-10
icse
rmo
special senses
+2
votes
1
answer
An imaginary material reflects red light, scatters green light, transmits blue light and absorbs yellow, orange and violet light.
asked
Mar 21, 2019
in
Class 10
by
kratos
class-8
electromagnetic waves
spectrum
light energy
ntse
class-10
icse
+2
votes
1
answer
Is the spectrum obtained by an equilateral glass prism pure or impure? Explain your answer.
asked
Mar 16, 2019
in
Class 10
by
kratos
electromagnetic waves
class-10
spectrum
icse
+3
votes
1
answer
State two uses of ultraviolet radiations.
asked
Mar 12, 2019
in
Class 10
by
kratos
spectrum
class-10
icse
electromagnetic waves
+3
votes
1
answer
Give one use electromagnetic radiations in Infrared radiation.
asked
Mar 12, 2019
in
Class 10
by
kratos
electromagnetic waves
class-10
spectrum
icse
+2
votes
1
answer
State two properties of ultra-violet radiations which differ from visible light.
asked
Mar 11, 2019
in
Class 10
by
kratos
spectrum
class-10
icse
+1
vote
1
answer
Suggest one way, in each case, by which we can detect the presence of: 1. Infrared radiations.
asked
Mar 8, 2019
in
Class 10
by
kratos
spectrum
class-10
icse
electromagnetic waves
+2
votes
1
answer
Name any two electromagnetic waves which have a frequency higher than that of violet light. State one use of each.
asked
Mar 8, 2019
in
Class 10
by
kratos
spectrum
class-10
icse
electromagnetic waves
+1
vote
1
answer
Two parallel rays of Red and Violet travelling through air, meet the air-glass boundary as shown in the above figure :
asked
Mar 7, 2019
in
Class 12
by
kratos
neet
reflection of light
electromagnetic waves
spectrum
class-11
aiims
class-10
icse
dispersion and spectra
+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
communication
electromagnetic waves
spectrum
class-10
icse
class-12
contemporary physics
+1
vote
1
answer
CO2 laser produces (a) microwaves (b) infra red (c) ultra violet (d) visible light
asked
Feb 24, 2019
in
Class 12
by
kratos
neet
spectrum
aiims
class-10
icse
+2
votes
1
answer
Which is not a source of ultraviolet radiations? (a) Sun (b) Arc lamp (c) Electric heater
asked
Feb 22, 2019
in
Class 10
by
kratos
electromagnetic waves
class-10
spectrum
icse
+3
votes
1
answer
X-rays are produced by (a) oscillating circuits in special vacuum tubes (b) excitation of outermost electronic shell of an atom
asked
Feb 22, 2019
in
Class 10
by
kratos
electromagnetic waves
class-10
spectrum
icse
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