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प्रश्न
The speed of light varies in different media.
विकल्प
Right
Wrong
उत्तर
The speed of light varies in different media- Right
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संबंधित प्रश्न
Where is the image when you look at something in a mirror?
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?
Which type of reflection of light leads to the formation of images?
The image in a plane mirror is virtual and laterally inverted. What does this statement mean?
When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?
A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?
In which material do you think light rays travel faster-glass or air?
Fill in the following blank with suitable word:
Light bends when is passes from water into air. We say that it is ............
What is meant by the 'angle of incidence' and the 'angle of refraction' for a ray of light?
Light travels more quickly through water than through glass.
Which is optically denser : water or glass?
With the help of a labelled diagram, explain why a tank full of water appears less deep than it actually is.
Show the lateral displacement of the ray on the diagram.
Explain with the help of a labelled ray diagram, why a pencil partly immersed in water appears to be bent at the water surface. State whether the bending of pencil will increase or decrease if water is replaced by another liquid which is optically more dense than water. Give reason for your answer.
A ray of light passes from a medium X to another medium Y. No refraction of light occurs if the ray of light hits the boundary of medium Y at an angle of:
(a) 0°
(b) 45°
(c) 90°
(d) 120°
A ray of light when passes from glass to air, bends towards the normal.
The depth of a pond when seen from above appears to be less.
What do you understand by refraction of light?
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)
A small air bubble in a glass block when seen from above appears to be raised because of ______.
Define the principal focus of a concave mirror.
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.
Explain how the formation of a rainbow occurs.
Identify the wrong figure from the following.
Write scientific reason.
A pencil appears to be broken near the surface of water.
State whether true or false. If false, correct the statement.
The angle of deviation depends on the refractive index of the glass.
Why does a ray of light bend when it travels from one medium to another?
What is refractive index?
You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?
The angle of incidence for a ray of light having zero reflection angle is ______.
The bending of light as it passes from one medium to another is called ______.
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.
Why a pencil partly immersed in water appears to be bent at the water surface.
In refraction of light through a glass slab, the directions of the incident ray and the refracted ray are ______.
