Question 1

Monochromatic light (λ = 500 nm)is incident on a soap bubble (n = 1.4)that is 50 mm thick.What is the change of phase of the light reflected from the front surface?

Accepted Answer

A) 0 
B) 180° 
C) λ/2 
D) π/2 
E) 55° 
A) 0 
B) 180° 
C) λ/2 
D) π/2 
E) 55°

Question 2

Suppose two flat glass plates 30-cm long are in contact along one end and separated by a human hair at the other end.If the diameter of the hair is 50 μm,find the separation of the interference fringes when the plates are illuminated by green light,λ = 546 nm.

Accepted Answer

The answer of Suppose two flat glass plates 30-cm long...

Question 3

A film of index of refraction n1 coats a surface with index of refraction n2.When n1 > n2,the condition for constructive interference for reflected monochromatic light of wavelength λ in air is

Accepted Answer

A)    . 
B)    . 
C)    . 
D)    . 
E)    . 
A)    . 
B)    . 
C)    . 
D)    . 
E)    .

Question 4

In a double-slit experiment using light of wavelength 486 nm,the slit spacing is 0.600 mm and the screen is 2.00 m from the slits.Find the distance along the screen between adjacent bright fringes.

Accepted Answer

The answer of In a double-slit experiment using light of...

Question 5

The figures below represent interference fringes.The distances from the screen to the slits is the same for each figure,and the planes of the screen and the slits are parallel.In each figure the spacing d between the slits is the same.Which figure(s)represent(s)slits illuminated with light of the shortest wavelength λ? The white spaces represent the interference maxima.

Accepted Answer

A) I. 
B) II. 
C) III. 
D) IV. 
E) V. 
A) I. 
B) II. 
C) III. 
D) IV. 
E) V.

Question 6

A film of index of refraction n1 coats a surface with index of refraction n2.When n1 2,the condition for destructive interference for reflected monochromatic light of wavelength λ in air is

Accepted Answer

A)    . 
B)    . 
C)    . 
D)    . 
E)    . 
A)    . 
B)    . 
C)    . 
D)    . 
E)    .

Question 7

The figures below represent interference fringes.The distances from the screen to the slits is the same for each figure,and the planes of the screen and the slits are parallel.Which figure(s)represent(s)slits with the greatest spacing d between the slits? The white spaces represent the interference maxima.

Accepted Answer

A) I. 
B) II. 
C) III. 
D) IV. 
E) V. 
A) I. 
B) II. 
C) III. 
D) IV. 
E) V.

Question 8

The light reflected from a soap bubble (n = 1.40)appears red (λ = 640 nm)at its center.What is the minimum thickness (in nm)?

Accepted Answer

A) 124 
B) 104 
C) 114 
D) 134 
E) 234 
A) 124 
B) 104 
C) 114 
D) 134 
E) 234

Exam 37: Wave Optics

Monochromatic light (λ = 500 nm)is incident on a soap bubble (n = 1.4)that is 50 mm thick.What is the change of phase of the light reflected from the front surface?

Suppose two flat glass plates 30-cm long are in contact along one end and separated by a human hair at the other end.If the diameter of the hair is 50 μm,find the separation of the interference fringes when the plates are illuminated by green light,λ = 546 nm.

A film of index of refraction n1 coats a surface with index of refraction n2.When n1 > n2,the condition for constructive interference for reflected monochromatic light of wavelength λ in air is

In a double-slit experiment using light of wavelength 486 nm,the slit spacing is 0.600 mm and the screen is 2.00 m from the slits.Find the distance along the screen between adjacent bright fringes.

A film of index of refraction n1 coats a surface with index of refraction n2.When n1 < n2,the condition for destructive interference for reflected monochromatic light of wavelength λ in air is

The light reflected from a soap bubble (n = 1.40)appears red (λ = 640 nm)at its center.What is the minimum thickness (in nm)?

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Filters

A film of index of refraction n₁ coats a surface with index of refraction n₂.When n₁ > n₂,the condition for constructive interference for reflected monochromatic light of wavelength λ in air is

A film of index of refraction n₁ coats a surface with index of refraction n₂.When n₁ < n₂,the condition for destructive interference for reflected monochromatic light of wavelength λ in air is