Refraction of Light
Refraction of Light
When light traveling in a medium (such as air) enters another medium (such as water), it generally bends at the surface separating the two media. But once it is in the second medium, it moves along a straight line. This phenomenon of bending of light at the surface separating two media is commonly known as refraction of light.
The Change in the path of light ray as it passes from one medium to another medium is called refraction of light. If the refracted ray bends towards the normal we say that the Medium 2 is denser than Medium 1.But if the refracted ray bends away from the normal we say that the Medium 2 is rarer than Medium 1. The light ray that falls normally i.e. at right angles from medium 1 to medium 2 then it does not bend or change its path. Such a ray goes undeviated in medium 2.
The surface separating the two media is also called the interface between them. Not the entire light incident on the interface between two media passes into the second medium after refraction; a small part of light gets reflected too.
Cause of Refraction:
Refraction of light takes place due to the change in the speed of light as it enters the medium 2 from medium 1.
Effects of Refraction in Our Day to Day life:
1. A spoon dipped in water. The part of the spoon in air and water appears to be disjoint.
2. While standing in a clear pool of water, the bottom looks raised and our legs appear shorter.
3. The bottom of a glass tumbler filled with water appears raised when viewed from above.
4. If we put pins or coins in a tumbler filled with water and look from the side, their images appear enlarged.
5. Our ability to see also depends on refraction. Our eyes contain several transparent liquids. When light from an object enters our eyes, it is refracted at the surfaces of these liquids to produce an image.
6. Refraction is also responsible for such wonderful things as the twinkling of stars and the sparkling of diamonds.
Illustration: If while standing on the bank of a stream you wished to catch a fish swimming in the water in front of you, would you aim above, below or directly at the observed fish to catch it?
A rainbow is formed due to _____________ of sunlight by water droplets. | |||
| Right Option : A | |||
| View Explanation | |||
The light that is reflected from a Compact Disc (CD) consists of ______________ | |||
| Right Option : B | |||
| View Explanation | |||
The light ray is incident at an angle 'i' at the point of incidence. if it bends away from the normal by making angle of refraction 'r' then | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [20]
Abhyas is an institute of high repute. Yogansh has taken admission last year. It creates abilities in child to prepare for competitive exams. Students are motivated by living prizes on basis of performance in Abhyas exams. He is satisfied with institute.
Yogansh Nyasi
7thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
Barkha Arora
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
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Shreya Shrivastava
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Yatharthi Sharma
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
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Om Umang
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Ayan Ghosh
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Hiya Gupta
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Aman Kumar Shrivastava
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Shreya Shrivastava
8thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
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Eshan Arora
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Barkha Arora
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Cheshta
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