×
FREE ASSISTANCE FOR THE INQUISITIVE PEOPLE
Tutorial Topics
X
softetechnologies
Reflection Of Light
Source of light and medium of light - Physics Light
6565    Arnab De    03/01/2020

Light is an energy which can make visible an object. In a dark room we cannot see anything in the room even through keep our eyes open. But when a bulb or any source of light is switched on in the room, then all the objects are visible. As, light is an energy, it follows the conservation law of energy. i.e. light can neither be created nor be destroyed. We can only convert the light into another form of energy and vice versa. Sun is the main Light source in the world.

softetechnologies

When light start from a point, then it is known as spotlight source. But if the light source has a geometrical shape, then it is known as area light source. Light travel in a straight line. If we place an opaque substance, then light cannot travel on it and create two types of blackish shadow just opposite side of the substance, first one is slightly darker, which is known as umbra and the shadow is called the penumbra.

softetechnologies

Optical Medium

We can see a lamp, because light came from this lamp to our eyes. Its came thought the air. Here air is the medium of light.

Optical Medium: The transparent medium is known as an optical medium by which light can travel from one location to another.

Homogeneous Medium: The optical medium is known as a homogeneous medium by which light can travel same speed in every direction. E.g. glass, air, water.

Heterogeneous Medium: The optical medium is known as a heterogeneous medium by which light can travel in different speed in different direction.

Opaque Medium: The optical medium is known as an opaque medium by which light cannot travel from one location to another. E.g. any metal body.

Semi-transparent medium: The optical medium is known as a semi-transparent medium by which light can travel partly from one location to another. E.g. scratch glass, oil paper, wax paper.

Reflection Of Light
softetechnologies
Author Details
Arnab De
I have over 16 years of experience working as an IT professional, ranging from teaching at my own institute to being a computer faculty at different leading institute across Kolkata. I also work as a web developer and designer, having worked for renowned companies and brand. Through tutorialathome, I wish to share my years of knowledge with the readers.
Enter New Comment
Comment History
No Comment Found Yet.
Albert Einstein
If you can't explain it simply, you don't understand it well enough.
Albert Einstein
250
30.23
Today So Far
Total View (Lakh)
softetechnologies
01/01/2018     32764
28/06/2017     28265
02/08/2017     25749
26/05/2018     24613
15/05/2017     21948
06/07/2017     20689
01/08/2017     20171
21/04/2018     18041
25/06/2018     15606
01/07/2017     15469
softetechnologies