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प्रश्न
An extended object in the form of an arrow pointing upward has been placed in front of a plane mirror. Draw a labelled ray-diagram to show the formation of its image.
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उत्तर
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संबंधित प्रश्न
What is refraction of light?
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.
As light rays pass from water into glass, are they refracted 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?
Show the lateral displacement of the ray on the diagram.
How does the light have to enter the glass:
to produce a large amount of bending?
When a ray of light travels from water to air, it bends ............. the normal.
Match the Following
| Column A | Column B |
| (a) white Light | (1) Convex mirror |
| (b) Refraction | (2) Concave mirror |
| (c) Virtual images | (3) refraction |
| (d) Real images | (4) spectrum |
| (e) Prism | (5) ray of light from glass to air |
A ray of light A incident from air suffers partial reflection and refraction at the boundary of water.
- Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C.
- How are the angles of incidence i and refraction r related?
Fill in the blank and Explain the completed sentences.
The change in ______ of light rays while going from one medium to another is called refraction.
List four characteristics of the image formed by a concave lens of focal length 20 cm when the object is placed at a distance of 40 cm from its optical centre.
The size of image of an object by a convex lens of focal length 20 cm is observed to be reduced to `1/3` rd of its size . Find the distance of the object from the optical centre of the lens .
The incident rays and refracting rays are on opposite sides of the normal.
The speed of light varies in different media.
Observe the given figure and write appropriate phenomenon of light in the box.
Explain the working of a periscope.
The phenomenon of light passing through the object is called ______.
Under what circumstances there won’t be any refraction of light when it enters from one medium to another?
In refraction of light through a glass slab, the directions of the incident ray and the refracted ray are ______.
