हिंदी

Observe the Figure and Write Accurate Conclusion Regarding Refraction of Light.

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प्रश्न

Observe the figure and write accurate conclusion regarding refraction of light.

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उत्तर

When a light ray passes from a rarer medium to a denser medium, it bends towards the normal.

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2018-2019 (March) Balbharati Model Question Paper Set 1

संबंधित प्रश्न

Explain how spectrum is formed.


When rays of light are incident on a glass slab then the incident ray and emergent ray are _________ each other.

  1. perpendicular
  2. parallel
  3. opposite
  4. concurrent

Write a short note on dispersion of light.


Why do we get a spectrum of seven colors when white light is dispersed by a prism?


State the dependence of angle of deviation On the refractive index of the material of the prism.


Which colour of light travels fastest in any medium except air?


Draw the diagram of refraction of light in the glass slab


 How can you bend light away from the normal?


 How must light travel out of a substance if it is not going to be refracted? 


Draw diagrams to show the refraction of light from 

  1. air to glass, and
  2. glass to air. In each diagram, label the incident ray, refracted ray, the angle of incidence
  3. and the angle of refraction (r).

A ray of light strikes the surface of a rectangular glass block such that the angle of incidence in
air is  0°.
In each case, draw diagram to show the path taken by the ray as it passes through the glass block and emerges from it. 


When a lighted candle is held in front of a thick plane glass mirror, several images can be seen, but the second image is the brightest, give reason.


A ray of light of wavelength 6600 Å suffer refraction from air to glass. Taking \[\ce{_a\mu_g = \frac{3}{2}}\], find the wavelength of light in glass.


A ray of light is passing from a transparent medium 1 to another transparent medium 2 (i) Speed up (ii) slows down. In each case, state whether the refractive index of medium 2 is equal to, less than or greater than the refractive index of medium 1. 


Fill in the blanks to complete the following sentence 

When light travels from a denser to a rarer medium, its speed ………………. 


A Water pond appears to be 2.7 m deep. If the refractive index of water is 4/3, find the actual depth of the pond. 


What is meant by the statement the critical angle for diamond is 24°?


Select from the following the best experimental set-up for tracing the path of a ray of light through a glass slab:
(A) I

(B) II

(C) III

(D) IV


Write the SI unit for refractive index.

Is dispersion same as deviation?

Which of the following has the highest refractive index:


Show by a diagram the refraction of two incident rays parallel to the principle axis passing through a convex lens by treating it as a combination of a glass block and two triangular glass prisms.

Show by a diagram, the refraction of two incident rays parallel to the principle axis passing through a concave lens by treating it as a combination of a glass block and two triangular glass prisms.

A ray of light strikes the surface at a rectangular glass slab such that the angle of incidence is 45o.

In each case, draw diagram to show the path taken by the ray as it passes through the glass slab and emerges from it.


How does the deviation produced by a prism depend on the wavelength of incident light?


A total reflecting equilateral prism can be used to deviate a ray of light through:


Why do the faces of persons sitting around campfire appear to shimmer?


A fish swimming in a pond seems nearer than it really is. Explain.


A glass slab is placed over a page on which the word VIBGYOR is printed with each letter in its corresponding colour.

  1. Will the image of all the letters be in the same place?
  2. If not, the state which letter will be raised to the maximum. Give a reason for your answer.

What is the refractive index of vacuum


Why does the sun appear bigger during sunset or sunrise?


In the diagram below, PQ is a ray of light incident on a rectangular glass block.

How are the angles ‘i’ and ‘e’ related to each other?


Light passes through a rectangular glass slab and through a triangular glass prism. In what way does the direction of the two emergent beams differ and why?


Explain with the help of a diagram of how fish is able to see the objects above it.


Draw a diagram of a prism and label:
(i) the base,
(ii) the refracting surfaces,
(iii) the refracting edge,
(iv) the refracting angle in it.


The refractive index of glass with respect to air is 3/2. What is the refractive index of air with respect to glass?


Draw the ray diagram of a glass slab having medium A and B for the velocity of light ray VA and VB respectively and define Snell's law.

  1. If VB = 1.5 VA, then which medium is denser?
  2. What is the refractive index of A with respect to B?
  3. What is the refractive index of B with respect to A?

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