intereference , young double slit Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What is the equation for young double slit experiment

and meaning of the letters

A

λ = sX/D

λ is wavelength

D is the distance between slit and the screen

s is the slit separation

x is fringe separatiaion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How to carry out young double slit experiment

A

Use a monochoromatic light source, and the light waves will reach the single slit and be diffracted to be in phase. Then light waves will reach the double slits where they will be diffracted at both slits. They are coherent at double slit as they come from same monochromatic light source. And use slits of similar gap to the wavelength

After passing through, the diffracted waves overlap and interfere.

in places of constructive interference there is bright fringes

places of destructive interference there is dark fringes

out of phase = no light

in phase = light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what does monochromatic light waves mean

A

light waves with same wavelength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does the principle of superposition state

A

When two or more waves of the same type meet, the resultant wave can be found by adding the displacements of the individual waves.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

define coherence

A

two waves with a constant phase relationship

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what does path difference mean

what does phase difference mean

A

difference between the distances travelled by two waves arriving at the same point.

phase diff is the difference in the phases of two waves of same frequency.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does a path difference of half a wavelength result in how much phase difference

A

PIE RADIANS X 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what type of number of wavelengths is the path difference of constructive interference

and destructive interference

A

whole number of wavelengths

odd nr of wavelengths

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Whats the phase difference intervals of contrsuctive interference and destructive interference in degrees

A

contrustive - 0,360,720

destrucive - 180,540, 900 +360

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

can you apply young double slit equation to non coherent waves

A

yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly