U2.4.7-2.4.14 Flashcards

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1
Q

What is phase difference

A

The difference in phase of two waves at a point

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2
Q

What is path difference

A

Difference between the distances from two sources to a given point

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3
Q

What are the conditions for observable interference

A

Coherent source

Same or similar amplitude

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4
Q

What is the equation for youngs double slit

A

Lambda = ay / d

Lambda = wavelength
a = slit separation
y = fringe separation
d = distance between slits and screen

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5
Q

What is diffraction

A

The spreading of waves passing through an aperture/opening or passing by an obstacle. Maximum diffraction occurs when the gap width is approximately equal to the wavelength of the wave

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6
Q

Diffraction grating equation please

A

d sin(theta) = n lambda

d = separation of slits of grating spacing
n = diffraction order maximum or order number
Theta = the angle of diffraction where the maximum is observed
Lambda = wavelength

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