Name at least 2 places wherein the principle of multiple reflection is used.?

Question

Homework again! Need an answer ASAP..you guys have 7 hours..thanks!

Answer 1

if you mean practical uses for it, i have one, there are new sustainable building products called 'Sun Tubes' they are built into structures to allow natural light into the building through ceilings. they are tubes which have a mirrored inside surface and the natural light is reflected down the tube and into the room!

Answer 2

Multiple reflection is used in:
1) Lasers. The light reflects between two mirrors: one 100% reflective and one that is 99% reflective. There is material between the two mirrros that gets "excited" by the light and gives off even more light (LASER=Light Amplification through Stimulated Emission of Radiation) . The 99% mirror lets 1% of the light out which is where the laser beam comes from.

2) Optical fibres used in telecommunications. The transmitter shines light in pulses down a fibre made from pure glass or plastic. The light bounces of the sides of the fibre due to total internal reflection. The receiver then decodes the pulses into data.

Answer 3

Multiple reflections eh ?

Diamonds are one good example, as the light enters it is totally internally reflected due to the high refractive index (around 2.5) - and the crystal structure - which is why they seem to sparkle, this is also true of another 'cheaper' alternative to diamond - the Cubic Zirconia.

Another good multiple reflection is your pet cats eyes. Light enters the lens and hits the retina (which acts like a mirror aswell as a detector) some light is absorbed to form an image, the other is then bounced back towards the lens, the lens then reflects the light back to the retina for a second time and another image is formed.

This is why cats can see in the dark so well.

There are millions of applications where multiple reflection occurs.

Answer 4

In the physics section
In Periscopes