Question

A glass lens is coated on one side with a thin film of magnesium fluoride (MgF2)...

A glass lens is coated on one side with a thin film of magnesium fluoride (MgF2) in order to reduce reflection from the lens surface. The index of refraction of MgF2 is 1.42; that of the glass the lens is made out of is 1.50. What is the least thickness for the coating that eliminates the reflections of light that is in the middle of the visible spectrum (wavelength 550 nm)?

Please show all work and explain how you got the answer

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A camera lens (n = 1.50) is coated with a thin film of magnesium fluoride (n...
A camera lens (n = 1.50) is coated with a thin film of magnesium fluoride (n = 1.38) of thickness 78.0 nm. What wavelength in the visible spectrum is most strongly transmitted through the film?
An anti-glaring uniform thin film of magnesium fluoride (MgF2, index of refraction 1.38) covers a crown...
An anti-glaring uniform thin film of magnesium fluoride (MgF2, index of refraction 1.38) covers a crown glass case of refractive index 1.52. This film has a thickness such that it cancels normally incident light of wavelength 525 nm that strikes the film surface from air. The film is thicker than the minimum thickness to achieve this cancellation. Over time, the MgF2 film wears away at a rate of 2.10 nm per year. What is the minimum number of years before...
A coating of magnesium fluoride MgF2 is often applied to lenses as an anti-reflective coating. It...
A coating of magnesium fluoride MgF2 is often applied to lenses as an anti-reflective coating. It has a refractive index (~ 1.35) between that of air (n=1) and glass (n = 1.5). a) Compare the phase change at the first surface reflection (air to MgF2), to the phase change at the MgF2 to glass surface reflection. Say individually if they would be in phase (no additional path length) or out of phase (add λ/2 path length). Note that in calculating...
Eyeglasses are often coated with an anti-reflecting coating to reduce glare in the visible part of...
Eyeglasses are often coated with an anti-reflecting coating to reduce glare in the visible part of the spectrum. Consider a 95.0-nm-thick coating applied to the lens, where we wish to reduce the glare of the blue end of the spectrum with wavelengths near 450 nm. a) If the coating’s index of refraction is smaller than that of the lens, what index of refraction for the anti-reflection coating is needed for the thinnest film possible? b) If the coating’s index of...
Calculate the minimum film thickness of a MgF2 (n(l) = 1.37) antireflection coating applied to a...
Calculate the minimum film thickness of a MgF2 (n(l) = 1.37) antireflection coating applied to a crown glass (n=1.52) lens immersed in air. Assume normal incidence. Find the required minimum film thickness for the back side of the lens where the incidence medium if glass, and for the front side of the lens where the incident medium is air. Design for a vacuum wave length of 550 nm
A thin film of MgF2 (n= 1.38) coats a piece of glass. Constructive interference is observed...
A thin film of MgF2 (n= 1.38) coats a piece of glass. Constructive interference is observed for the reflection of light with wavelength of 325 nm and 455 nm. What is the thinnest film for which this can occur?
Engineers are testing a new thin-film coating whose index of refraction is less than that of...
Engineers are testing a new thin-film coating whose index of refraction is less than that of glass. They deposit a 420-nm-thick layer on glass, then shine lasers on it. A red laser with a wavelength of 640 nm has no reflection at all, but a violet laser with a wavelength of 400 nm has a maximum reflection. How the coating behaves at other wavelengths is unknown. What is the coating's index of refraction?
A thin film of MgF2 (n = 1.38) coats a piece of glass. Constructive interference is...
A thin film of MgF2 (n = 1.38) coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 460 nm and 613 nm .      A. What is the thinnest film for which this can occur? (Express your answer with the appropriate units.) d =
1. You observe two point sources of light that are spaced 10 cm apart which are...
1. You observe two point sources of light that are spaced 10 cm apart which are each emitting light of wavelength of 590 nm. If the diameter of your pupil is 2 mm, how distant can the objects be from your eye for you to just barely resolve them 2. Light traveling in air (index of refraction 1.00) falls onto a thin plastic film (index of refraction 1.30) of unknown thickness that covers glass (index of refraction 1.50). What minimum...
A thin coating (t = 352.5 nm , n = 1.455) is placed on a glass...
A thin coating (t = 352.5 nm , n = 1.455) is placed on a glass lens. PART A: Which visible (400 nm < λ < 700 nm) wavelength(s) will be absent in the reflected beam if the glass has an index of refraction n = 1.350? Express your answer using four significant figures. If there is more than one answer, separate them by a comma. PART B: Which visible (400 nm < λ < 700 nm) wavelength(s) will be...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT