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Aashish Rohilla
Subject: Physics
, asked on 26/1/18
Question):- In a double slit experiment, the distance between the slits is 3 mm and the slits are 2 m away from the screen. Two interference patterns can be seen on the screen one due to light with wavelength 480 nm, and the other due to light with wavelength 600 nm. What is the separation on the screen between the fifth order bright fringes of the two interference patterns?
Answer
1
Joel Abraham
Subject: Physics
, asked on 24/1/18
in a single slit diffraction experiment, the path difference at a point on the screen is 2lambda.is it a dark band or a light band?
Answer
1
Dipesh Malhotra
Subject: Physics
, asked on 18/1/18
How is angular spread 2 theta for central max in diffraction pattern?
Answer
1
Prerna Varshney
Subject: Physics
, asked on 18/1/18
In what way is diffraction from each slit is related to interferrence pattern in a double slit experiment ?
Please don't give links
Answer
1
Dipesh Malhotra
Subject: Physics
, asked on 17/1/18
Explain how light is polarised by scatteting! Pls explain briefly!!
Answer
1
Dipesh Malhotra
Subject: Physics
, asked on 17/1/18
Explain with diagram pls
CBSE Board paper 2009
Question: At what angle of incidence should a light beam strike a glass slab of refractive index
3
, such that the reflected and the refracted rays are perpendicular to each other?
Solution:
When angle between reflected and refracted ray is 90
°
,
tan i =
3
where, i= Angle of incidence
i=
tan
-
1
3
i= 60
°
Answer
1
Shivam Sharma
Subject: Physics
, asked on 13/1/18
Solve this:
(i) In Young's double slit experiment, describe briefly how bright and dark fringes are obtained on the screen kept in front of a double slit. Hence, obtain the expression for the fringe width.
Answer
2
Shivam Sharma
Subject: Physics
, asked on 13/1/18
Solve this:
ii) What is the effect on the interference fringes in Young's double slit experiment when (a) the width of the source slit is increased; (b) the monochromatic source is replaced by a source of white light?
All India 2015
Answer
2
Shivam Sharma
Subject: Physics
, asked on 13/1/18
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Answer
1
Mohitsrinivas
Subject: Physics
, asked on 13/1/18
what is polarisation of light? can you explain mauls law
Answer
1
Sandra Saju
Subject: Physics
, asked on 12/1/18
Use Huygen's principle to show the propagation of a plane wave front from a denser medium to a rarer medium. Hence find the ratio of the speeds of the wave fronts in the two media.
Answer
1
Sandra Saju
Subject: Physics
, asked on 12/1/18
Why an unpolarised light incident on a polarised gets linearly polarised ?
Answer
1
Sandra Saju
Subject: Physics
, asked on 12/1/18
Derive the expression of Brewster's law when unpolarised light passing from a rarer to a denser medium get polarised on reflection at the interface.
Answer
1
Sandra Saju
Subject: Physics
, asked on 12/1/18
The polarising angle for slab is ?/3 radian. Calculate its refractive index.
Answer
1
Sandra Saju
Subject: Physics
, asked on 12/1/18
Why can sound waves be diffracted more easily than light waves ?
Answer
1
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Please don't give links
CBSE Board paper 2009
Question: At what angle of incidence should a light beam strike a glass slab of refractive index , such that the reflected and the refracted rays are perpendicular to each other?
Solution:
When angle between reflected and refracted ray is 90,
tan i =
where, i= Angle of incidence
i=
i= 60
(i) In Young's double slit experiment, describe briefly how bright and dark fringes are obtained on the screen kept in front of a double slit. Hence, obtain the expression for the fringe width.
ii) What is the effect on the interference fringes in Young's double slit experiment when (a) the width of the source slit is increased; (b) the monochromatic source is replaced by a source of white light? All India 2015