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Suggest a Method to Produce a Rainbow in Your House. - Physics

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प्रश्न

Suggest a method to produce a rainbow in your house.

टीपा लिहा

उत्तर

A rainbow can be produced using a prism. Another way of producing a rainbow is to dip a mirror inside water, keeping it inclined along the wall of a tumbler. The light coming from water after reflecting from the mirror will give a rainbow.

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Refraction Through a Prism
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 20: Dispersion and Spectra - Short Answers [पृष्ठ ४४१]

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एचसी वर्मा Concepts of Physics Vol. 1 [English] Class 11 and 12
पाठ 20 Dispersion and Spectra
Short Answers | Q 6 | पृष्ठ ४४१

संबंधित प्रश्‍न

A ray of light passing from air through an equilateral glass prism undergoes minimum deviation when the angle of incidence is 3/4 th of the angle of prism. Calculate the speed of light in the prism. 


Three rays (1, 2, 3) of different colours fall normally on one of the sides of an isosceles right angled prism as shown. The refractive index of prism for these rays is 1.39, 1.47 and 1.52 respectively. Find which of these rays get internally reflected and which get only refracted from AC. Trace the paths of rays. Justify your answer with the help of necessary calculations.


Write the relationship between angle of incidence ‘i’, angle of prism ‘A’ and angle of minimum deviations for a triangular prism.


Trace the path of the ray (P) of light passing through the glass prism as shown in the figure. The prism is made of glass with critical angle ic = 41°.


Three light rays red (R), green (G) and blue (B) are incident on a right angled prism ‘abc’ at face ‘ab’. The refractive indices of the material of the prism for red, green and blue wavelengths are 1.39, 1.44 and 1.47 respectively. Out of the three which colour ray will emerge out of face ‘ac’? Justify your answer. Trace the path of these rays after passing through face ‘ab’.


A small object is embedded in a glass sphere (μ = 1.5) of radius 5.0 cm at a distance 1.5 cm left to the centre. Locate the image of the object as seen by an observer standing (a) to the left of the sphere and (b) to the right of the sphere.


Answer the following question.
Calculate the angle of emergence (e) of the ray of light incident normally on the face AC of a glass prism ABC of refractive index `sqrt(3)`. How will the angle of emergence change qualitatively, if the ray of light emerges from the prism into a liquid of refractive index 1.3 instead of air?


A prism is made of glass of unknown refractive index. A parallel beam of light is incident on the face of the prism. The angle of minimum deviation is measured to be 40°. What is the refractive index of the material of the prism? The refracting angle of the prism is 60°. If the prism is placed in water (refractive index 1.33), predict the new angle of minimum deviation of a parallel beam of light.


The refractive index of a prism whose angle A = 60° is `sqrt2`. Then the angle of minimum deviation δm will be ______.


An isosceles prism of angle 120° has a refractive index 1.44. Two parallel monochromatic rays enter the prism parallel to each other in air as shown. The rays emerge from the opposite faces:


For a glass prism `(µ = sqrt(3))` the angle of minimum deviation is equal to the angle of the prism. Find the angle of the prism.


A ray PQ is incident normally on the face AB of a triangular prism of refracting angle 60° as shown in figure. The prism is made of a transparent material of refractive index `2/sqrt(3)`. Trace the path of the ray as it passes through the prism. Calculate the angle of emergence and the angle of deviation.


Two prisms ABC and DBC are arranged as shown in the figure.

The critical angles for the two prisms with respect to air are 41.1° and 45° respectively. Trace the path of the ray through the combination.


A horizontal ray of light passes through a prism of index 1.50 and apex angle 4° and then strikes a vertical mirror, as shown in the figure (a). Through what angle must the mirror be rotated if after reflection the ray is to be horizontal?


The maximum value of the index of refraction of a material of a prism which allows the passage of light through it when the refracting angle of the prism is A is ______.


A triangular prism of glass is shown in the figure. A ray incident normally to one face is totally internally reflected. If θ is 45°, then the index of refraction of the glass is ______.

 


Two concave refracting surfaces of equal radii of curvature face each other in the air as shown in the figure. The point object O is placed midway between the centre and one of the poles. Then the separation between the images of O formed by each refracting surface is ______.

  


A ray of monochromatic light passes through an equilateral glass prism in such a way that the angle of incidence is equal to the angle of emergence and each of these angles is 3/4 times the angle of the prism. Determine the angle of deviation and the refractive index of the glass prism.


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