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• Refraction And Dispersion By Prism×

Refraction And Dispersion By Prism Free Doubts and Solutions

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

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Asked by pksunilnair 5th December 2017, 6:56 PM

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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

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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

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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

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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

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(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

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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

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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

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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?

Asked by Nidhi 30th December 2014, 11:13 PM

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a prism( =1.5) has the refracting angle of 30 the deviation of a monochromatic ray incident normally on its one surface will be (sin 48 36 =0.75)

Asked by Nidhi 22nd December 2014, 2:19 PM

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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

Asked by Topperlearning User 8th July 2014, 3:16 PM

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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)] Asked by Topperlearning User 8th July 2014, 3:02 PM

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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

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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

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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

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State the factor on which the dispersive power of a prism depends?

Asked by Topperlearning User 10th June 2014, 2:38 PM

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Can we combine two prism? If yes what is the purpose?

Asked by Topperlearning User 10th June 2014, 2:28 PM

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Define dispersion.

Asked by Topperlearning User 10th June 2014, 2:07 PM

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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

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What is a prism?

Asked by Topperlearning User 10th June 2014, 1:48 PM

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(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

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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

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A prism of angle 60Âº gives a minimum deviation of 30Âº. What is the refractive index of the material of the prism ?

Asked by Topperlearning User 4th June 2014, 1:23 PM

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Define dispersive power and derive its formula.

Asked by Topperlearning User 4th June 2014, 1:23 PM

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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

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What causes the phenomenon of dispersion?

Asked by Topperlearning User 4th June 2014, 1:23 PM

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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

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which is the crystal in which dispersion doesnt take place? (excluding glass slab)

Asked by Sagar krishna 17th May 2014, 10:02 PM

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Question on dispersion

Asked by 4th March 2008, 11:38 AM