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CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Ray optics
Asked by sahupranav2006
2nd March 2024,
3:37 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Show that the angle of deviation will be minimum when a light ray passes through a prism symmetrically.
Asked by mridulabarua05
20th February 2019,
4:57 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
pls solve.....
pls solve.....
Asked by pksunilnair
5th December 2017,
6:56 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Asked by modi72879
8th November 2017,
8:02 AM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
When red light goes from air to water. What will be it's colour in water
Asked by nareshkumar
19th October 2017,
1:09 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
from boards point of view is scattering of light , human eye and combination of mirror and lens can be asked in exams?
Asked by vasturushi
7th September 2017,
2:27 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
one face of prism of refractive index 1.5(n1) and refracting angle 75 is covered with a liquid refractive index of 1.06(n2).what should be the angle of incidence of light on the clear face of prism for which light should be totally internally reflected at the liquid covered face ?
Asked by Rzainabafra -
13th March 2017,
4:01 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Draw a graph showing the variation of angle of deviation ‘δ’ with that of angle
of incidence ‘i’ for a monochromatic ray of light passing through a glass prism
of refracting angle ‘A’. What do you interpret from the graph? Write a relation
showing the dependence of angle of deviation on angle of incidence and hence
derive the expression for refractive index of the prism.
Calculate the value of θ, for which light incident normally on face AB grazes
along the face BC. μg = 3/2 μw = 4/3.
Draw a graph showing the variation of angle of deviation ‘δ’ with that of angle
of incidence ‘i’ for a monochromatic ray of light passing through a glass prism
of refracting angle ‘A’. What do you interpret from the graph? Write a relation
showing the dependence of angle of deviation on angle of incidence and hence
derive the expression for refractive index of the prism.
Calculate the value of θ, for which light incident normally on face AB grazes
along the face BC. μg = 3/2 μw = 4/3.
Asked by mahamood.iphone
5th January 2016,
3:50 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
(a) Two thin convex lenses L1 and L2 of focal lengths f1 and f2, respectively, are placed coaxially in contact. An object is placed at a point beyond the focus of lens L1. Draw a ray diagram to show the image formation by the combination and hence derive the expression for the focal length of the combined system. (b) A ray PQ incident on the face AB of a prism ABC, as shown in the figure, emerges from the face AC such that AQ = AR. Draw the ray diagram showing the passage of the ray through the prism. If the angle of the prism is 60° and refractive index of the material of prism is, determine the values of angle of incidence and angle of deviation.
Asked by Topperlearning User
10th July 2015,
11:30 AM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
show that no ray can pass through the prism whose refracting angle A is greater than twice the critical angle for the material of the prism. (2008 cbse)
Asked by rohit dalal
17th February 2015,
10:19 AM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
A right angled prism made from a material of refractive index 𝜇 is kept in air. A ray PQ is incident normally on the side AB of the prism.Find (in terms of 𝜇) the maximum value of 𝜃 upto which this incident ray necessarily undergoes total internal reflection at the face AC of the prism.
Asked by Indra
1st February 2015,
7:55 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
ordinary light incident on a glass slab at the polarising angle suffers a deviation of 22
.the value of the angle of refraction in glass in this case is.(ans.34
)how pls explain?
.the value of the angle of refraction in glass in this case is.(ans.34)how pls explain?
Asked by Nidhi
30th December 2014,
11:13 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
a prism( 
=1.5) has the refracting angle of 30the deviation of a monochromatic ray incident normally on its one surface will be (sin 4836
=0.75)
=1.5) has the refracting angle of 30the deviation of a monochromatic ray incident normally on its one surface will be (sin 4836=0.75)
Asked by Nidhi
22nd December 2014,
2:19 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
A ray of light, incident on an equilateral glass prism
moves parallel to the base line of the prism it. Find the angle of incidence for this ray
moves parallel to the base line of the prism it. Find the angle of incidence for this ray
Asked by Topperlearning User
8th July 2014,
3:16 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
A beam of light of wavelength 400 nm is incident normally on a right angled prism as shown. It is observed that the light just grazes along the surface AC after falling on it. Given that the refractive index of the material of the prism varies with the wavelength λ as per the relation
calculate the value of b and the refractive index of the prism material for a wavelength λ = 5000 
.[Given θ = sin-1(0625)]
.[Given θ = sin-1(0625)]
Asked by Topperlearning User
8th July 2014,
3:02 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
A ray of light passing through an equilateral triangular glass prism from air undergoes minimum deviation when angle of incidence is of the angle of prism. Calculate the speed of light in the prism.
Asked by Topperlearning User
11th June 2014,
7:00 AM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Draw a ray diagram to show refraction of a ray of monochromatic light passing through a glass prism.Deduce the expression for the refractive index of glass in terms of angle of prism and angle of minimum deviation.
Asked by Topperlearning User
11th June 2014,
6:55 AM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Calculate the refractive index of a material of prism of angle 15 degrees which gives a deviation of 8 degrees.
Asked by Topperlearning User
10th June 2014,
2:43 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
State the factor on which the dispersive power of a prism depends?
Asked by Topperlearning User
10th June 2014,
2:38 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Can we combine two prism? If yes what is the purpose?
Asked by Topperlearning User
10th June 2014,
2:28 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Define dispersion.
Asked by Topperlearning User
10th June 2014,
2:07 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
What is the difference in refraction through a prism and refraction through a glass slab?
Asked by Topperlearning User
10th June 2014,
2:00 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
What is a prism?
Asked by Topperlearning User
10th June 2014,
1:48 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
(a) An equilateral glass prism is placed on a horizontal surface. A ray PQ is incident on it. For minimum deviation: (i) PQ is horizontal (ii) QR is horizontal (iii) RS is horizontal (iv) None of these (b) A thick lens gives coloured images due to ________ (c) In a compound micro scope the nature of the intermediate image is __________ (d) Based on refraction and total internal reflection explain the formation of rainbow.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Write the relationship between angle of incidence 'i', angle of prism 'A' and angle of minimum deviation for a triangular prism.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
A prism of angle 60º gives a minimum deviation of 30º. What is the refractive index of the material of the prism ?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Define dispersive power and derive its formula.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Calculate the angular dispersion produced by a prism of angle 6 degree, if the refractive indices of material of prism for blue and green colours are 1.664 and 1.655.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
What causes the phenomenon of dispersion?
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Calculate the deviation produced by a prism of angle 8 degree, for a material of refractive index 1.5.
Asked by Topperlearning User
4th June 2014,
1:23 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
which is the crystal in which dispersion doesnt take place? (excluding glass slab)
Asked by Sagar krishna
17th May 2014,
10:02 PM
CBSE - XII Science - Physics - Ray Optics and Optical Instruments
Question on dispersion
Asked by
4th March 2008,
11:38 AM
