Create your Smart Home App in the Free Webinar on Home Automation. Register Now
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
Free webinar on App Development Learn to create your own Smart Home App
16th Jan @ 5:00PM for Grade 1 to 10
Sit and relax as our customer representative will contact you within 1 business day
A thin film of thickness t and index of refraction 1.33 coats a glass with index of refraction 1.50.What is the least thickness t that will strongly reflect light with wavelength 600nm incident normally
Expression of Least thickness t that will strongly reflect light: since, t = nλ/2μ Here, λ = Wavelength = 600 nm μ = Refractive index of film = 1.33 For least thickness : n = 1 Hence, t = λ / 2μ = 600 / 2*1.33 = 600/ 2.66 = 225.56 ≈ 225 nm Thus, least thickness t that will strongly reflect light with wavelength 600nm incident normally is 225 nm. Thanks and regards
the condition is 2μtcosr = nλfor normal incident r = 90hence 2μt = nλso, t = nλ/2μHere,λ = Wavelength = 600 nmμ = Refractive index of film = 1.33For least thickness : n = 1Hence,t = λ / 2μ= 600 / 2*1.33= 600/ 2.66= 225.56≈ 225 nmnone of the options are correct. But we can take nearest answer whic is 200nm
the condition is 2μtcosr = nλ
for normal incident r = 90
hence 2μt = nλ
so, t = nλ/2μ
Here,
λ = Wavelength = 600 nm
μ = Refractive index of film = 1.33
For least thickness : n = 1
Hence,
t = λ / 2μ
= 600 / 2*1.33
= 600/ 2.66
= 225.56
≈ 225 nm
none of the options are correct. But we can take nearest answer whic is 200nm
the condition is 2μtcosr = nλfor normal incident r = 0 deghence 2μt = nλso, t = nλ/2μHere,λ = Wavelength = 600 nmμ = Refractive index of film = 1.33For least thickness : n = 1Hence,t = λ / 2μ= 600 / 2*1.33= 600/ 2.66= 225.56≈ 225 nmnone of the options are correct. But we can take nearest answer whic is 200nm
for normal incident r = 0 deg
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -