मराठी

A light ray enters from medium A to medium B as shown in Figure 10.2. The refractive index of medium B relative to A will be

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प्रश्न

A light ray enters from medium A to medium B as shown in Figure 10.2. The refractive index of medium B relative to A will be

पर्याय

  • greater than unity

  • less than unity

  • equal to unity

  • zero

MCQ
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उत्तर

greater than unity

Explanation - 

The ray of light travelling from medium A to medium B bends towards the normal. It shows that the medium B is denser and the medium A is rarer.

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पाठ 10: Light – Reflection and Refraction - Multiple Choice Questions [पृष्ठ ८०]

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एनसीईआरटी एक्झांप्लर Science Exemplar Class 10
पाठ 10 Light – Reflection and Refraction
Multiple Choice Questions | Q 5. | पृष्ठ ८०

संबंधित प्रश्‍न

How will you explain the statement 'we cannot see the objects in a dark room'?


Differentiate between the reflection of light from a plane mirror and that from a plane sheet of paper.


The diagram in Figure shows a point object in front of a plane mirror MM1.

(a) Complete the diagram by taking two rays from the point P to show the formation of its image.

(b) In the diagram, mark the position of eye to see the image.

(c) Is the image formed real or virtual? Explain why?


An object is placed 2 cm from a plane mirror. If the object is moved by 1 cm towards the mirror, what will be the distance between the object and its new image?


Why do automobile drivers prefer convex mirror as a rear vew mirror? Illustrate your answer.


In the figure is shown a concave mirror. A is a point on the principal axis. If an object O is kept at A, image is formed on A itself. Copy the diagram. Draw the image in the diagram. Is the image real or virtual?

Measure the distance PA and write it in the diagram. What is the distance PA called?
Mark a point B on the principal axis, at which, if a point source of light is kept, the rays travel parallel to principal axis after reflection from M. What is point B called?


An object OA is placed on the principal axis of a concave mirror as shown in the figure. Copy and complete the diagram to show the formation of image.


What do you mean by light?

State whether the following statement is true or false. If false, correct it.

The angle of incidence is the angle made by the incident ray with the plane mirror.


State whether the following statement is true or false. If false, correct it.

If a ray of light incident on a plane mirror is such that it makes an angle of 30o with the mirror, then the angle of reflection is 60o.


When a ray of light strikes a plane mirror at an angle of 150 with the mirror, what will be the angle through which the ray will deviate? Illustrate with a ray diagram in the following figure.


Complete the ray diagram to show the image observed by the eye after reflection in the following figure.


Complete the path of incident ray in the following case.


Find the odd one.
sun, candle, torch, pen


Find the odd one.
glass bottle, exam pad, paper plate, wooden board


The moon ______ sun light.


Say TRUE or FALSE

We see a book because it reflects the light that falls on its surface


Higher Order Thinking Skills.

When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?


In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror?


Suppose we wish to obtain the real image of a distant tree. Explain two possible ways in which we can do it.


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