Layer of transparent optical coating on a transparent medium, Physics

Assignment Help:

In terms of the wavelength of the pertinent light how thick must the layer of transparent optical coating on a transparent medium be in order to create maximum destructive interference of the reflected light therefore maximizing transmission? (select the answer that is appropriate for the case in which light that is travelling in air is approaching a piece of glass along a path that is normal to the surface of the glass and the coating whose index of refraction is between that of air and that of glass is to be placed on the first surface of the glass to be encountered by the light in order to minimize reflection from that surface.)

Answer:

We require the path length difference between light that bounces off the air-coating interface and the light that bounces off the coating-glass interface to be one-half a wavelength in order to get destructive interference. The light that goes throughout the first interface (the air-coating interface) travels through the width of the coating bounces off the coating-glass interface and travels back through the thickness of the coating again prior to passing back out through the air-coating interface to join the light that bounced off the air-coating interface. The additional distance that the light that goes through the first interface travels is thus twice the thickness of the coating. For that distance to be half a wavelength the width of the coating must be a quarter of a wavelength. Since the additional travelling that the light that goes through the air-coating interface does is in the coating material it is the wavelength that the light has when it is in the coating material that matters not the wavelength that the light has when it is in the air.


Related Discussions:- Layer of transparent optical coating on a transparent medium

Quantum mechanicm, compton effect and quantum nature of light

compton effect and quantum nature of light

Electromagnetic induction, i need to think of a project to assemble as soon...

i need to think of a project to assemble as soon as possible but i need some ideas.. what projects can i present??

Determine the dynamic resistance, A coil of resistance 1.5k Ω and 0.25H ind...

A coil of resistance 1.5k Ω and 0.25H inductance is connected in parallel with a variable capacitance across a 10V, 8kHz supply. Calculate (a) the capacitance of the capacitor

Maxwells electromagnetic equations, Starting from Maxwell's electromagnetic...

Starting from Maxwell's electromagnetic equations in vacuum, get the wave equations for the four fields vectors E, D, B and H.

What are the methods of inducing emf in a circuit, Q. What are the methods ...

Q. What are the methods of inducing emf in a circuit? The induced emf is able to be produced by changing a) The magnetic induction (B) b) Area enclosed by the coil (A) f

What is seebeck effect, Q What is Seebeck effect? Seebeck revealed tha...

Q What is Seebeck effect? Seebeck revealed that in a circuit consisting of two dissimilar metals like iron and copper an emf is developed when the junctions are maintained at

Explain any one of the drawbacks of rutherford atom model, Q. Explain any o...

Q. Explain any one of the drawbacks of Rutherford atom model. As-per to the classical electromagnetic theory the accelerating electron must radiate energy at a frequency propo

What are the sources of dispersion in optical fibers, What are the sources ...

What are the sources of dispersion in optical fibers? Sources of Dispersion into Optical fibers: The key sources of dispersion of pulses within optical fibers can be catego

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd