Some natural phenomena of light - class-XII
Description: some natural phenomena of light | |
Number of Questions: 61 | |
Created by: Vijay Puri | |
Tags: the human eye and the colourful world physics human eye and colourful world natural phenomena spectrum energy production ray optics and optical instruments optics vision and the world of colours effects of light |
Which of the following statement is correct?
An astronaut in a spaceship the sky appears black due to:
One cannot see through fog because .......... .
Planets do not twinkle as stars, because :
Sodium lamps are used in foggy conditions because:
The sun appears red at the time of sun-rise and sun-set. This is because:
Why are danger signals always red in color?
The path of a beam of light is invisible in which solution?
The phenomenon of scattering of light by fine particles is called _____ :
Which of the following are examples of scattering of light?
Why does sun appear reddish at sunrise and sunset?
Why do high rise buildings have a red light on the top of the building?
The path of beam of light becomes _____ in a colloidal solution.
Very large particles may scatter light of which color?
Why does the sky appear blue?
The color of scattered light depends on ____ of the scattering particles.
Maximum and minimum scattering in visible range are respectively
Scattering of light is seen when light passes through:
Scattering of light is defined as:
Blue colour of wter in sea is due to
By which optical phenomena the splitting of white light into seven constituent colours occur?
Intensity of light ray in a direction after scattering by small particles (smaller than wavelength):
Which of the following observations cannot be explained by Tyndall Effect?
Tyndall effect is shown by:
Which of the following phenomenon is involved in Tyndall effect?
Which of the following quantities changes during the process of scattering?
Which of the following occurs in scattering?
After scattering, the light moves in:
Stars twinkle but planets do not twinkle because
As the thickness of the atmosphere increases colour of scattered light is found in ________ order.
The earth's atmosphere is transparent for the visible light.
The clear sky appears blue because:
What are the colours of the Sun observed most during sunrise/sunset and noon?
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
Red light is used as danger signal because it is:
Blue colour of sky is due to:
Raman effect is an example of
Tyndall effect is applicable when?
Which of the following statements is correctregarding the propagation of light of differentcolours of white light in air?
Which of the following phenomena cannot be explained by scattering of light ?
Which one of the following statements is correct?
Surface of a CD is coded with
At sunrise or sunset, the sun appears to be reddish white. This is because :
C.V Raman's major contribution was on
Assertion: The setting sun appears to be red.
Reason: Scattering of light is directly proportional to the wavelength.
Assertion: By roughening the surface of a glass sheet its transparency can be reduced.
Reason: Glass sheet with rough surface absorbs more light.
Larger particles scatter light at the ____ end of the spectrum the least.
In a beaker containing colloidal solution of sodium thiosulphate and a drop of con. sulphuric acid, light observed from side of beaker is:
When is the direction of scattered light independent of the wavelength?
Rising and setting sun appears to be reddish because:
The process of re-emission of absorbed light in all directions with different intensities by the atom or molecule is called ____________.
A beam of monochromatic light first travels through glass of R.I. $1.5$ and then through water (R.I. $=\dfrac{4}{3}$). If the difference in their wavelengths in the two media is $40$nm, then the wavelength of the monochromatic light in vacuum will be?
One can not see through fog because:
The rising and setting of sun appear red because of :
CV Raman got the Nobel Prize for his experiment on :
It is very difficult to see through fog because
Stokes and antistokes line observed in Raman scattering is due to ________ of light.
In Raman scattering, Stokes and Antistokes lines respectively represents lines with ______ and _____ wavelength
In Raman effect, the wavelength of the incident radiation is $5890\overset{o}{A}$. The wavelengths of Stocks and anti-stocks lines are respectively.
Antistokes lines is Raman scattering are the lines of ________ frequency and __________ wavelength.