PHYS 1260 EXAM 4 QUESTIONS WITH VERIFIED
ANSWERS
Light from two closely spaced stars cannot produce a steady interference pattern due to
- Answers - incoherence
In the double slit experiment, fringes are more widely spaced when illumination is with
monochromatic (single color) - Answers - longer wavelength light
When waves from a pair of closely spaced slits arrive in phase - Answers - a bright
fringe is produced
Interference colors in a soap bubble is evidence that the soap film - Answers - has two
reflecting surfaces and thin [both of these]
In wave optics - Answers - we make a distinction between coherent and incoherent
sources of light.
An incoherent source of light - Answers - lacks a specific direction and has a relatively
large Δf.
A coherent source of light - Answers - has a specific direction with a much smaller Δf.
A household light bulb is a/an - Answers - incoherent source of visible radiation.
A laboratory laser is a/an - Answers - coherent source of visible radiation.
Will you have a coherence over a time interval 10^-6 s for light? - Answers - a stabilize
Ne-He laser
A wave with a longer coherence length is closer toa perfect - Answers - sinusoidal wave
If you have two waves and they are in phase - Answers - Their amplitudes adds and
you get a bright fringe.
Rainbow - Answers - *dispersion* of sunlight into a continuous distribution of colors
according to wavelength, produced by the refraction and reflection of sunlight by water
droplets in the sky
According to the special theory of relativity, while traveling at a very high speed your
pulse rate - Answers - remains unchanged
ANSWERS
Light from two closely spaced stars cannot produce a steady interference pattern due to
- Answers - incoherence
In the double slit experiment, fringes are more widely spaced when illumination is with
monochromatic (single color) - Answers - longer wavelength light
When waves from a pair of closely spaced slits arrive in phase - Answers - a bright
fringe is produced
Interference colors in a soap bubble is evidence that the soap film - Answers - has two
reflecting surfaces and thin [both of these]
In wave optics - Answers - we make a distinction between coherent and incoherent
sources of light.
An incoherent source of light - Answers - lacks a specific direction and has a relatively
large Δf.
A coherent source of light - Answers - has a specific direction with a much smaller Δf.
A household light bulb is a/an - Answers - incoherent source of visible radiation.
A laboratory laser is a/an - Answers - coherent source of visible radiation.
Will you have a coherence over a time interval 10^-6 s for light? - Answers - a stabilize
Ne-He laser
A wave with a longer coherence length is closer toa perfect - Answers - sinusoidal wave
If you have two waves and they are in phase - Answers - Their amplitudes adds and
you get a bright fringe.
Rainbow - Answers - *dispersion* of sunlight into a continuous distribution of colors
according to wavelength, produced by the refraction and reflection of sunlight by water
droplets in the sky
According to the special theory of relativity, while traveling at a very high speed your
pulse rate - Answers - remains unchanged
