Thin-Film Interference
Authored by Hossam AlDeen Abu Sharb
Physics
11th Grade
NGSS covered
Used 36+ times
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6 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The index of refraction of the thin film (water) is higher than air as shown in Figure above - the reflected ray will undergo a phase change of ½λ ( or π rad).
TRUE
FALSE
Tags
NGSS.HS-PS4-1
NGSS.HS-PS4-3
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
At the bottom soap-air interface ( soap film has a higher index of refraction n > 1) there will be a phase change for ray 2.
TRUE
FALSE
Tags
NGSS.HS-PS4-1
NGSS.HS-PS4-3
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the path difference of the reflected rays traveling through the film?
t
2nt
t/2
0
Tags
NGSS.HS-PS4-1
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the condition for the constructive interference of the thin film shown in figure above?
2t = mλ where m = 0,1,2,3,...
2nt = mλ where m = 0,1,2,3,...
2t = (m+½)λ where m = 0,1,2,3...
2nt = (m+½)λ where m = 0,1,2,3...
Tags
NGSS.HS-PS4-1
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the condition for destructive interference to occur for the soap film shown?
2nt = mλ
2nt = (m+¼)λ
2nt = (m+½)λ
2nt = (m+¾)λ
Tags
NGSS.HS-PS4-1
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
. Every time light hits a "thin film" - there is a phase change occurs for the reflected ray.
False
True
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