PHYSICS - OBJECTIVE 1

1. White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in air contains 

(a) yellow, orange ,red

(b) violet ,indigo, blue

(c) all colours 

(d) all colours except green 

 answer (a)

ANSWER (explanation) : When the white light enters the glass prism refraction occurs for higher frequency electromagnetic waves in the VIBGYOR spectrum.

Here Violet,Indigo,Blue are lower frequency and hence undergoes Total Internal reflection. The Yellow,Orange and Red spectrum undergoes refraction by arosing out of the barrier of glass slab.Hence this is known as totally internally reflected light plus totally refracted radio spectrum with gradually varying wavelength attitude.

Once western scientists considered wrongly, white rays as fully absorbing type. Einstein toppled this wrong idea in the west.He found out black hole is all-absorbing . As per this, the concept of Einstenian Continuum was made.At this point, Einstein's friend ,Swami Vivekananda decided to apply the theory of Indra's Net. 

Then they conducted experiment after passing light through cube prism .They found glass plate shining in Green colour. Based on this, Albert Einstein made his Refraction theory

n1sinθ1 = n2sinθ2

As per this equation they began to secretly convert White light to green light.Westerners did n't knew about this colored light. They named the instrument Diode .

Then onwards westerners started lighting colored lights in City streets using this diode reflection.

Vivekananda asked whether green will change color if the entry angle of white light change .Einstein checked and told yes. Einstein called it as Critical dimension Angle.

This angle when calculated gives dimension around 42 degrees .If the angle increases ,green light will bend upwards and will be visible outwards.The Air-glass interface refractive index value is matching with green,hence green light gets visible. If it was below water ,refractive index would change and θ will change.

Green light is used in Traffic light ,as per this speciality of air glass interface.When mirror gets rotated the light color would become Red (Orange color comes in between)

This is called as Relative radio spectrum of light. Rainbow has water drops in it ,so all seven colors becomes visible