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प्रश्न
Light travels at a lower speed in water than in air.
विकल्प
True
False
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उत्तर
True.
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संबंधित प्रश्न
Name the phenomenon responsible for the following effect:
When we sit in front of a plane mirror and write with our right hand, if appears in the mirror that we are writing with the left hand.
A wall reflects light and a mirror also reflects light. What difference is three in the way they reflect light?
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 ______.
A ray of light travelling in glass emerges into air. State whether it will bend towards the normal or away from the normal.
In which material do you think light rays travel faster-glass or air?
How does the light have to enter the glass:
for no refraction to happen?
Air is optically .......... than glass.
Choose the correct option from given alternative:
A real image is formed by the light rays after reflection or refraction when they:
(A) actually meet or intersect with each other.
(B) actually converge at a point
(C) appear to meet when they are produced in the backward direction.
(D) appear to diverge from a point.
Which of the above statements are correct?
The speed of light varies in different media.
When light passes from one medium to another the ray gets bent. This property of light is called ______.
