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प्रश्न
Fill in the following blank with suitable word:
Light bends when is passes from water into air. We say that it is ............
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उत्तर
Light bends when is passes from water into air. We say that it is refracted.
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संबंधित प्रश्न
| Column I | Column II | Column III | |
| 1 | Dispersion | Long-sightedness | Twinkling of stars |
| 2 | Refraction | Splitting of white light into component colours | Convex lens |
| 3 | Hypermetropia | Change in the direction of the ray of light due to change in medium | Spectrum of seven colours |
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?
State whether the following statement is true of false:
A student says that we can see an object because light from our eyes is reflected back by the object.
Write the word AMBULANCE as it would appear when reflected in a plane mirror. Why is it sometimes written in this way (as its mirror image) on the front of an ambulance?
Explain why, though both a plane mirror and a sheet of paper reflect light but we can see the image of our face in a plane mirror but not in a sheet of paper.
A ray of light strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is ______.
As light rays pass from water into glass, are they refracted towards the normal or away from the normal?
What is meant by the 'angle of incidence' and the 'angle of refraction' for a ray of light?
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
How does the light have to enter the glass:
for no refraction to happen?
When a ray of light travels from water to air, it bends ............. the normal.
Define the principal focus of a concave mirror.
What is atmospheric reflection? Explain with the help of a labelled diagram that the position of a star as seen by us is not its true position.
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 .
Write scientific reason.
The sun appears on the western horizon for some time after sunset.
Which surface will not reflect most of the light falling on them?
The phenomenon of light passing through the object is called ______.
When a ray of light travels normal to the given surface, then the angle of refraction is ______.
