Please select a subject first
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A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?
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As light rays pass from water into glass, are they refracted towards the normal or away from the normal?
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In which material do you think light rays travel faster-glass or air?
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Which phenomenon of light makes the water to appear shallower than it really is?
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State whether the following statement is true or false:
Refraction occurs because light slows down in denser materials.
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Why does a ray of light bend when it travels from one medium to another?
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Fill in the following blank with suitable word:
Light travelling along a normal is ...............refracted.
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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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What is meant by 'refraction of light'? Draw a labelled ray diagram to show the refraction of light.
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A ray of light travelling in air is incident on a rectangular glass block and emerges out into the air from the opposite face. Draw a labelled ray diagram to show the completer path of this ray of light. Mark the two points where the refraction of light takes place. What can you say about the final direction of ray of light?
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What is meant by the 'angle of incidence' and the 'angle of refraction' for a ray of light?
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Light travels more quickly through water than through glass.
Which is optically denser : water or glass?
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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?
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When a light ray passes from air into glass, what happens to its speed? Draw a diagram to show which way the ray of light bends.
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A coin in a glass tumbler appears to rise as the glass tumbler is slowly filled with water. Name the phenomenon responsible for this effect.
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With the help of a labelled diagram, explain why a tank full of water appears less deep than it actually is.
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Name the phenomenon due to which a pencil partly immersed in water and held obliquely appears to be bent at the water surface.
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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.
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Show the lateral displacement of the ray on the diagram.
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State two factors on which the lateral displacement of the emergent ray depends.
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