# LIGHT vikash das
Get Started. It's Free LIGHT ## 1. through Prism

### 1.1. Dispersion of Light

1.1.1. each colourof light travel with different speed in a given medium

1.1.2. depends on wavelength

1.1.2.1. formation of spectrum (VIBGYOR)

1.1.3. Phenomena in nature

1.1.3.1. Rainbow

1.1.4. Tyndall Effect

1.1.4.1. Phenomena of Scattering of white light by dust ,smoke and water droplets suspended in air

## 2. Rarer to Denser

### 2.1. Towards the Normal

2.1.1. Intensity of Scattering

2.1.2. Angle of Incidence>Angle of Refraction

## 9. Reflection

### 9.1. Laws of Reflection

9.1.1. 1.The Incident ray ,the Reflected ray and the Normal, at the point of Incidence lies at the same plane

9.1.2. 2.The Angle of Incidence is equal to the Angle of Reflection.

### 9.2. Mirror

9.2.1. Plane

9.2.1.1. Characteristics

9.2.1.1.1. 4.Height of Image = Height of Object

9.2.2. Spherical

9.2.2.1. Concave

9.2.2.1.1. Uses

9.2.2.1.2. Dentist, ENT specialist ,Shaving Mirror

9.2.2.2. Convex

9.2.2.2.1. 2.Magnification= +1

9.2.2.2.2. Silvered at inner surface. Reflecting surface curved outward

9.2.2.3. Silvered at outer surface .Reflecting surface curved inward

9.2.3. Mirror Formula

## 10. Refraction

### 10.1. Myopia or Near sightedness-cannot see distant objects distinctly

10.1.1. Correction-Concave Lens

10.1.2. Myopia-My = Near Sightedness- can see Near

### 10.2. Laws of Refraction

10.2.1. 2.The ratio of sine of angle of incidence to the angle of refraction always remains constant known as Refractive Index

10.2.2. Angle of Incidence<Angle of Refraction

10.2.2.1. Inversely proportional to wavelength to the power 4

### 10.3. Denser to Rarer

10.3.1. 1.The Incident ray ,the Refracted ray and the Normal , at the point of incidence lies at the same plane.

10.3.1.1. The ray of light bends towards the Normal as the speed of light decreases with increase in density

10.3.2. Away from Normal

### 10.4. Spherical Lens

10.4.1. Convex Lens

10.4.1.1. Human Eye

10.4.1.1.1. Defects of Vision

10.4.2. Concave Lens

10.4.2.1. Eye lens become milky and cloudy

10.4.2.1.1. Correction- Surgery

10.4.3. Lens Formula

10.4.3.1. 1/f=1/v-1/u

10.4.3.1.1. magnification=hi/ho=v/u

10.4.4. Power of Lens

10.4.4.1. Power of a lens is defined as the reciprocal of focal length

10.4.4.1.1. P=1/f