Ch 17: Wave Optics Flashcards

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1
Q

When light travels (more slowly than in a vacuum) through a transparent medium, the wavelength inside the material decreases, but the ________ doesn’t change.

A

frequency

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2
Q

The spreading of diffraction becomes noticeable only when an opening or object is “narrow”, comparable in size to the __________ of the wave.

A

wavelength

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3
Q

The index of refraction is…

A

the speed of light in a vacuum (c) / the speed of light in the medium (v)

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4
Q

Given the following problem, what equation is needed in order to solve it?

A 1.0 cm-wide diffraction grating has 1000 slits. It is illuminated by light of wavelength 550 nm. What are the angles of the 1st two diffraction orders?

A

d sin θ = mλ

d represents the slit spacing, m represents the order of diffraction, and λ is the wavelength

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5
Q

What is the condition for constructive interference with either 0 or 2 reflective phase changes?

A

2t = m (λ/n)

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6
Q

What is the condition for destructive interference with only 1 reflective phase change?

A

2t = m (λ/n)

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7
Q

What is the condition for destructive interference with either 0 or 2 reflective phase changes?

A

2t = (m + 1/2)(λ/n)

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8
Q

What is the condition for constructive interference with only 1 reflective phase change?

A

2t = (m + 1/2)(λ/n)

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9
Q

Single slit diffraction:

Each point on a wave front is a source of spherical wavelets. The superposition of these wavelets products the diffraction pattern on the screen.
The constructive interference between these wavelets produces the _______ _________ of the diffraction pattern at θ = 0.

A

central maximum

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10
Q

What is the condition for dark fringes in a single-slit diffraction with slit width a?

A

a sin θ

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11
Q

What is the formula for percent error?

A
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