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WorksheetsQuickcheck on interference in thin film
Total questions: 10
Worksheet time: 5mins
What type of interference is shown?
Constructive
Destructive
What type of interference is shown?
Constructive
Destructive
Every time light hits a "thin film" - there is a phase change occurs for the reflected ray.
TRUE
FALSE
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
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
What is the path difference of the reflected rays traveling through the film?
t
2nt
t/2
0
Given the index of refractive for oil and water is 1.40 and 1.33 respectively. Both of the reflected rays act as inphase coherent source.
TRUE
FALSE
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...
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
A 180o (½λ) phase change occurs when light reflects from a medium of higher refractive index.
TRUE
FALSE
