Total Internal Reflection, Dispersion, Diffraction,Scattering Applications and Examples

Total Internal Reflection,  Dispersion, Diffraction,Scattering Applications and Examples

TOTAL INTERNAL REFLECTION

The complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle is called
Ans : Total Internal Reflection
The father of fibre optics
Ans : Narendra Singh Kapani

APPLICATIONS

In the construction of
Optical fibres
Endoscopy
Vehicle reflectors
Binoculars etc

EXAMPLES

Sparkling of diamond
Working principle of optical fibres
Glittering of water bubbles

DISPERSION

The splitting up of light ray into different colours is called
Ans : Dispersion
Dispersion was discovered by 
Ans : Sir Isaac Newton
Rainbow is formed due to
Ans : Reflection, Refraction and Dispersion of light
Main principle due to the formation of rainbow
Ans : Dispersion
Rainbow is seen as circle from
Ans : Space
Rainbow is seen as semi-circle from
Ans : Earth
Rainbow appears in the opposite direction of
Ans : Light
Red colour angle in rainbow
Ans : 42.8°
Violet colour angle in rainbow
Ans : 40.8°
Colour at top of a rainbow
Ans : Red
Colour at bottom of a rainbow
Ans : Violet
Colour at centre of a rainbow
Ans : Green

INTERFERENCE

The phenomenon that occurs when two waves meet while travelling along the same medium
Ans : Interference
Interference was observed first by
Ans : Thomas Young

APPLICATIONS AND EXAMPLES

Different colour of the soap foam
Oil spread in water
Colours that appear on the upper layer of oil that spread on road  
Holography, Holograms

DIFFRACTION

The bending of light around the corners of an obstacle or aperture into the region of geometrical shadow of the obstacle is called
Ans :Diffraction

APPLICATIONS AND EXAMPLES

The fuzzy uneven edges of shadow
Principle behind the working of projector in a film theatre 
Fringes pattern in CD

SCATTERING OF LIGHT

The reflection of a ray from a straight path due to particles or in the interface between two media is called
Ans : Scattering of Light

EXAMPLES

Reddening of sun at sunrise and sunset
The blue colour of the sky and sea 
Colour lamp used in fog for veicles 
Ans : Yellow light
On moon, sky appears black colour due to the absence of
Ans : Scattering of light 
Rayleigh scattering
Ans : Due to this blue colour of the sky and yellow tone of the sun
The scientist who explained the blue colour of the sky
Ans : Rayleigh
The scientist who explained the blue colour of sea
Ans : C.V.Raman

TYNDAL EFFECT

Scattering of light by colloidal particle is termed as
Ans : Tyndal effect

EXAMPLES

Sunlight passing through the mist 
Twinkling of comet 
Blue colour seen in the smoke emitted by motor cycles