Interferometry

Question 1

Young double slit is interference by _________

Answer 1

Division of wavefront

Question 2

Thin film interference is interference by division of _______

Answer 2

Amplitude

Question 3

Youngs double slit uses ________ light

Answer 3

Monochromatic

Question 4

Thin film interference uses _______ light

Answer 4

Polychromatic

Question 5

Youngs double slit uses what kind of source

Answer 5

Mutually coherent source

Question 6

Thin film interference uses what kind of source

Answer 6

Incoherent

Question 7

What kind of wave interference is there in youngs double slit

Answer 7

Two wave interference

Question 8

What kind of interference is there in thin film interference

Answer 8

Multiple wave interference (wave effect)

Question 9

Path difference in youngs double slit

Answer 9

Dsin0=mlambda

Question 10

Path diffference in thin film interference

Answer 10

2t=mlambda
Thickness is t=lambda/4n
Phase change
Material on both sides

Question 11

Do both youngs double slit and thin film interference boy law of conservation of energy?

Answer 11

Yes

Question 12

Instruments based on the principle of interference of light are known as this

Answer 12

Interferometers

Question 13

Applications of interferometers

Answer 13

• optical testing like surface roughness, flatness, curvature, etc
• wavelength of light
• thickness of thin strips
• optical aberrations of lenses, glassses etc
• small displacements
• refractive index changes
• spectroscopy

Question 14

What has interferometry been used for

Answer 14

For a long time in the astronomical telescopes, optics industry, and recently in biological imaging

Question 15

What can be used to determine if a coherent beam of light is collimated?

Answer 15

Shearing interferometers

Question 16

Optical surface profile measurement using interferometry

Answer 16

Surface profile shows the design and manufacturing defects before thousands of lenses are made

Question 17

Michelson interferometer is a division of ________

Answer 17

Amplitude

Question 18

Efficiency of Michelson interferometer is

Answer 18

50%

Question 19

What is the path difference for the interferometer?

Answer 19

2d

Question 20

For minimum energy in michelson interferometer

Answer 20

2d=mlambda

Question 21

For maximum energy in michelson interferometer

Answer 21

2d=(m+1/2)lambda

Question 22

Optical coherence tomography

Answer 22

Noninvasive interferometric imaging modality that provides significantly higher sensitivity and axial resolution than the conventional imaging systems

Question 23

What could become the new clinical standard for measuring the corneas refractive power?

Answer 23

OCT

Question 24

Completel anterior and posterior lens OCT

Answer 24

Full range imaging of eye accommodation by high speed long depth range optical frequency domain imaging

Question 25

What is OCT useful for?

Answer 25

Finding abnormalities in the retinal layers non invasively. Shows exactly what layer of the retina the damage is in

Question 26

LIGO

Answer 26

Michael son interferometry