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Question
What is meant by 'reflection of light'?
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Solution
The process of sending back light rays that fall on the surface of an object is called reflection of light.
RELATED QUESTIONS
Name the phenomenon responsible for the following effect:
When we sit in front of a plane mirror and write with our right hand, it appears in the mirror that we are writing with the left hand.
Which property of light makes a pencil cast a shadow when it is held in front of a light source?
Where is the image when you look at something in a mirror?
What are the important differences between looking at a photograph of your face and looking at yourself in a plane mirror?
Which type of reflection of light leads to the formation of images?
What is the difference between regular reflection of light and diffuse reflection of light?
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Define the following terms used in the study of reflection of light by drawing a labelled ray-diagram:
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The image in a plane mirror is virtual and laterally inverted. What does this statement mean?
A ray of light goes from water into air. Will it bend towards the normal or away from the normal?
Name the phenomenon due to which a swimming pool appears less deep than it really is.
When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?
State whether the following statement is true or false:
Refraction occurs because light slows down in denser materials.
A vertical ray of light strikes the horizontal surface of some water:
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A vertical ray of light strikes the horizontal surface of some water:
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Air is optically .......... than glass.
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List four characteristics of the image formed by a concave lens of focal length 20 cm when the object is placed at a distance of 40 cm from its optical centre.
Explain how the formation of a rainbow occurs.
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Light changes its direction when going from one transparent medium to another transparent medium. This is called _______.
Write scientific reason.
The bottom of a pond appears raised.
Write a scientific reason.
The coin disappears in a vessel as it is seen from a specific location. But as soon as the water is poured into the vessel to a certain level, the coin appears.
Observe the given figure and name the following.
| Ray AB | |
| Ray NM | |
| Ray MD | |
| ∠ r |
Observe the given figure and write appropriate phenomenon of light in the box.
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Assertion and reasoning type
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The angle of incidence for a ray of light having zero reflection angle is ______.
Noor, a young student, was trying to demonstrate some properties of light in her Science project work. She kept ‘X’ inside the box (as shown in the figure) and with the help of a laser pointer made light rays pass through the holes on one side of the box. She had a small butter-paper screen to see the spots of light being cast as they emerged.
Her friend noted the following observations from this demonstration:
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A star appears twinkling into the sky because of the reflection of light by the atmosphere.
Which is optically denser out of the two medium M1& M2 having the refractive indices = 1.71 and 1.36 respectively?
How do twinkling stars occur? (or) what is the cause of the twinkling of stars?
Match the following:
| Column I | Column II | ||
| 1. | r > 90 | a. | Light gazes at the surface of separation between the two modes. |
| 2. | r = 90 | b. | No refraction. |
| 3. | r < 90 | c. | Refracted ray away from the normal |
The bottom of swimming pool appears to be less deep than the actual one because of
The change in the direction of the path of light when it passes from one transparent medium to another transparent medium is called:
When light travels from a denser medium to a rarer medium, its speed:
According to the second law of refraction, for a given pair of media, the ratio of the sine of the angle of incidence to the sine of the angle of refraction:
Which of the following relations is called Snell's Law?
