Refraction in a Glass Slab
Refraction in a Glass Slab
Refraction of Light:
It is a process of bending of light ray when passing from one medium to another.This bending of light depends not only on the the refractive indices of the two media but also depends on the angle of incidence.
Refraction in a Glass Slab:
Suppose a ray of light AB traveling through air with refractive index ( = 1 ) incident at an
(angle of incidence) on the upper surface of a transparent rectangular slab. This ray gets refracted by an
(angle of refraction) at the upper surface and moves along BC known as refracted ray.
 |
As the ray of light travels from air (rarer medium) to the glass slab (denser medium) therefore it bends towards the normal which means that .
According to Snell's law
.......[ I ]
When the refracted ray ,BC reaches the lower surface SR,. is incident at an (angle of incidence) . This ray gets refracted by an
(angle of refraction) This refracted ray that comes out of the glass slab is known emergent ray. In this case light ray travels from glass slab (denser medium) to the air (rarer medium) and bends away from the normal which means
.
According to Snell's law
.......[ II ]
The two surfaces PQ and RS are parallel to each other so the normal at the two surface are also parallel to each other. and BC is the transversal cutting them so
................[ III ] [Alternate angles]
From II and III we get
Taking the reciprocal we get
.......[ IV ]
From Equation I and IV we get
But they are corresponding angles, as they are equal so we can say that the incident ray is parallel to emergent ray but is laterally didsplaced.This lateral distance between the incident ray and emergent ray is known as lateral displacement.
A light ray makes an angle of reflection 60, when it reflects from a plane reflecting sheet. The angle of deviation will be __________________ | |||
| Right Option : D | |||
| View Explanation | |||
A light ray incident on one of the parallel faces of rectangular glass slab, emerges out of the opposite parallel face of slab _________________ | |||
| Right Option : D | |||
| View Explanation | |||
In the case of glass slab the ray after refraction at the upper surface and moves inside the glass slab and is known as _________________ . | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [20]
When I have not joined Abhyas Academy, my skills of solving maths problems were not clear. But, after joining it, my skills have been developed and my concepts of science and SST are very well. I also came to know about other subjects such as vedic maths and reasoning.
Sharandeep Singh
7thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thAbhyas 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
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
10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thAbhyas 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
7thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
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
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
9thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
Manish Kumar
10thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
