If two light bulbs are placed side by side in front of a screen, no interference
ID: 1290547 • Letter: I
Question
If two light bulbs are placed side by side in front of a screen, no interference is observed. Why?
Each bulb produces only one wavelength of light
Each bulb produces many wavelengths of light
Incandescent light is incoherent
Incandescent light is so coherent that its wavelengths never get out of phase with one another
When you hold up a CD to the light, you see a colorful rainbow on its surface. This occurs because the CD acts as a _____ which produces color by _______
Prism; Diffraction
Transmission Grating; Interference
Reflection Grating; Interference
Prism; Dispersion
Light impinges on a slit but suffers very little diffraction. We conclude that the wavelength of the light is A. Much shorter than the slit width B. Much longer than the slit width C. About the same order as the slit width D. We cannot say anything about the wavelength
A.Each bulb produces only one wavelength of light
B.Each bulb produces many wavelengths of light
C.Incandescent light is incoherent
D.Incandescent light is so coherent that its wavelengths never get out of phase with one another
Explanation / Answer
1)
Incandescent light is incoherent
2)
Transmission Grating; Interference
C.Incandescent light is incoherent
2)
B.Transmission Grating; Interference