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प्रश्न
Fill in the following blank with a suitable word:
When light is reflected, the angles of incidence and reflection are ............ .
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उत्तर
When light is reflected, the angles of incidence and reflection are equal.
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संबंधित प्रश्न
The image of an object formed by a plane mirror is:
(a) virtual
(b) real
(c) diminished
(d) upside-down
A ray of light travelling in glass emerges into air. State whether it will bend 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?
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.
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?
How does the light have to enter the glass:
for no refraction to happen?
Light travels at a lower speed in water than in air.
Choose and write the correct option.
If we gradually increase the angle of incidence of a ray of light passing through prism then …..
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.
Identify the wrong figure from the following.
Write scientific reason.
The sun appears on the western horizon for some time after sunset.
Explain with diagrams how refraction of incident light takes place from
- rarer to denser medium
- denser to rarer medium
- normal to the surface separating the two media.
Which object use the reflection of light?
Mirage is an example of refraction and the total internal reflection of light.
Twinkling of stars and Mirage are the two phenomena occurring due to refraction.
Assertion: The air bubble shines in water.
Reason: Air bubble shines due to the refraction of light.
Why a pencil partly immersed in water appears to be bent at the water surface.
