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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

In refraction of light through a glass slab, the directions of the incident ray and the refracted ray are ______. - Science and Technology 1

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प्रश्न

In refraction of light through a glass slab, the directions of the incident ray and the refracted ray are ______.

पर्याय

  • Perpendicular to each other.

  • Non-parallel to each other.

  • Parallel to each other.

  • Intersecting each other.

MCQ
रिकाम्या जागा भरा
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उत्तर

In the refraction of light through a glass slab, the directions of the incident ray and the refracted ray are parallel to each other.

Explanation:

For refraction to happen the light ray will have to incident obliquely. If the light ray is incident on the glass slab at a zero angle of incidence the ray will travel without any change of direction. 

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2025-2026 (March) Model set 2 by shaalaa.com

संबंधित प्रश्‍न

Name the phenomenon responsible for the following effect:
When we sit in front of a plane mirror and write with our right hand, if appears in the mirror that we are writing with the left hand.


If an object is placed at a distance of 10 cm in from of a plane mirror, how far would it be from its image?


Fill in the following blank with a suitable word:
When light is reflected, the angles of incidence and reflection are ............ .


A ray of light strikes a plane mirror such that its angle of incidence is 30°. What angle does the reflected ray make with the mirror surface?


The letter F is placed in front of a plane mirror: 

 How would its image look like when seen in a plane mirror?


 Which type of reflection of light leads to the formation of images?


The boy walks towards the mirror at a speed of 1 m/s. At what speed does his image approach him?


What is meant by 'reflection of light'?


Define the following terms used in the study of reflection of light by drawing a labelled ray-diagram: 

(a) Incident ray
(b) Point of incidence
(c) Normal
(d) Reflected ray
(e) Angle of incidence
(f) Angle of reflection


The image of an object formed by a plane mirror is:

(a) virtual
(b) real
(c) diminished
(d) upside-down


The image formed by a plane mirror is :

(a) virtual, behind the mirror and enlarged.
(b) virtual, behind the mirror and of the same size as the object.
(c) real, at the surface of the mirror and enlarged.
(d) real, behind the mirror and of the same size as the object.


If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?


If a ray of light goes form a denser medium to a rarer medium, will it bend towards the normal or away from the normal?


Light travels more quickly through water than through glass. 

If a ray of light passes from glass into water, which way will it bend : towards the normal or away from the normal?


 Name the phenomenon due to which a pencil partly immersed in water and held obliquely appears to be bent at the water surface.


With the help of a diagram, show how when light falls obliquely on the side of a rectangular glass slab, the emergent ray is parallel to the incident ray.


Light travelling from a denser medium to a rarer medium along a normal to the boundary:

(a) is refracted towards the normal
(b) is refracted away from the normal
(c) goes along the boundary
(d) is not refracted


When a ray of light travelling in glass enters into water obliquely:

(a) it is refracted towards the normal
(b) it is not refracted at all
(c) it goes along the normal
(d) it is refracted away from the normal


A vertical ray of light strikes the horizontal surface of some water: 

 What is the angle of incidence?


The depth of a pond when seen from above appears to be less.


Draw a diagram showing the refraction of a light ray from water to glass. Label on it the incident ray, the angle of incidence (/), and the angle of refraction (r)


We can see the sun even when it is little below the horizon because of ______.


Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 108 m s−1.


Choose the correct option from given alternative:
A real image is formed by the light rays after reflection or refraction when they:
(A) actually meet or intersect with each other.
(B) actually converge at a point
(C) appear to meet when they are produced in the backward direction.
(D) appear to diverge from a point.
Which of the above statements are correct?


Write scientific reason.

A pencil appears to be broken near the surface of water.


Observe the given figure and write appropriate phenomenon of light in the box.


State whether true or false. If false, correct the statement.

The angle of deviation depends on the refractive index of the glass.


Explain with diagrams how refraction of incident light takes place from

  1. rarer to denser medium
  2. denser to rarer medium
  3. normal to the surface separating the two media.

Numerical problems.

The speed of light in water is 2.25 × 108 ms–1. If the speed of light in vacuum is 3 × 108 ms–1, calculate the refractive index of water.


The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called ______.


The angle of incidence from air to glass at the point O on the hemispherical glass slab is.


When light passes from one medium to another the ray gets bent. This property of light is called ______.


How does the light travel?


The ratio of the sine of the angle of incidence to the sine of ______ is constant.


A star appears twinkling into the sky because of the reflection of light by the atmosphere.


Which is optically denser out of the two medium M1& M2 having the refractive indices = 1.71 and 1.36 respectively?


Match the following:

  Column I   Column II
1. r > 90 a. Light gazes at the surface of separation between the two modes.
2. r = 90 b. No refraction.
3. r < 90 c. Refracted ray away from the normal

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