Part 1 Monochromatic light of wavelength, ? is traveling in air. The light then

Question

Part 1 Monochromatic light of wavelength, ? is traveling in air. The light then strikes a thin film having an index of refraction n1 that is coating a material having an index of refraction n2. If n1 is larger than n2, what minimum film thickness will result in minimum reflection of this light?

A) ?/n1

B) ?/2

C) ?/(4n2)

D) ?

E) ?/(2n2)

F) ?/n2

G) ?/(4n1)

H) ?/(2n1)

I) ?/4

J) The correct response is not shown above.

Part 2 Which one of the following actions would make the maxima in the interference pattern from a grating move further apart?
A.) Decreasing the wavelength of the laser.
B.) Increasing the frequency of the laser.
C.) Increasing the number of lines per length.
D.) Decreasing the distance to the screen.

-explination necessary

Explanation / Answer

minimum thickness t = L1/4n1

option G it is

------------------------

C.) apply Y = mLR/d

as Increasing the number of lines per length. makes d to decrases

if d decreases , Y increases

so opiton C is correct

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects