Nature of Light
Nature of Light
Light is an important form of energy that enables us to see the things around us. It produces the sensation of vision on our eyes. When light from an object enters our eyes, we see the object. This light can be that emitted by the object, as in the case of an electric bulb or a red-hot iron nail. It can also be the light bouncing off an object like a book. The branch of physics which deals with nature, source,properties and the effects of light is called optics.
What is the nature of light: Light has dual nature i.e, it behaves like a wave as well as particle.Its wave nature help us to understand how light bends around an object. It's particle nature called as photon explains how light travels in a straight line. Photon is a particle that has energy and movement , but does not have mass or electrical charge.
Light is an electromagnetic radiation i.e it has both electical and magnetic field components perpendicular to each other as well as to the direction of propagation of light wave.
Some Properties of Light : Light does not need a material medium to travel, i.e., it can travel through a vacuum too. The best example of this is light travelling from the sun to the earth across vast expanses of space that have no material (or matter). Compare this with sound, which is also a wave. Sound needs a material medium to travel. The speed of light waves depends on the medium through which it passes.
Which of the following are correct : (a) Light behaves like a wave as well as particle. (b) Light is an electromagnetic radiation. | |||
| Right Option : C | |||
| View Explanation | |||
To see various objects we need _____________________. | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct ? (a) Galileo once tried to measure the speed of light by trying to measure the time it takes to travel from one hill to another, but he could not. (b) The distance from the sun to the earth is 1485 lakh kilometers. (c) Light travels from the sun to the earth in 81/4 minutes. | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
One 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
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
10thAbout 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
7thAbhyas 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
10thIt 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
10thMy 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
8thMy 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
7thBeing 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 Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
