1.2 Types of medium

1.1 Refractive index of light
1.2 Types of medium

2.1 Refraction from a spherical surface

3.1 Shift due to a glass slab
3.2 Lateral Magnification

4.1 Sign convention
4.2 Some important terms
4.3 Ray tracing
4.4 Image formed by covex lens
4.5 Image formed by concave lens

5.1 Thin Lens Formula
5.2 Magnification and Power of lens
5.3 Combination of lenses
5.4 Displacement method to find focal length.
5.5 Silvering of lens

6.1 Critical angle
6.2 Application of total internal reflection

7.1 Dispersive power

8.1 Rainbow

9.1 Spectrometer
9.2 Simple microscope
9.3 Compound microscope
9.4 Astronomical telescope (Refracting type)
9.5 Terrestrial telescope
9.6 Galileo's terrestrial telescope
9.7 Reflecting type telescope

There are two types of medium,

1. Rarer medium

2. Denser medium

When we compare two media such as medium 1 and medium 2. Let medium 1 is a rarer medium and medium 2 is a denser medium.

Rarer medium: Medium 1 is known as the rarer medium when the light travels faster is medium 1 as compared to medium 2.

Denser medium: Medium 2 is known as the denser medium, when the light travel slower in medium 2 as compared to medium 1.

Note: Plural of medium is known as media.