Light Waves

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Huygen's principle states that every point on a wavefront can be considered a secondary source of waves, and the combination of these secondary waves determines the propagation and shape of subsequent wavefronts. Diffraction is the bending of light or other waves around obstacles and through slits, causing the waves to spread out and form interference patterns of light and dark bands. Specifically, AM radio waves diffract more than FM radio waves, allowing AM signals to travel farther.

1. HUYGENS' PRINCIPLE ,[object Object],[object Object]

. . . . . . . Consider several points on the wave front to be sources of secondary wavelets. . . . . . . .

2. DIFFRACTION ,[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

$AM band radio waves travel farther than FM band radio waves because (a) AM waves travel faster than FM waves (b) AM wavelengths are shorter than FM wavelengths (c) AM waves are scattered more than FM waves (d) AM waves are diffracted more than FM waves (d) AM waves are diffracted more than FM waves$

$If laser light passes by a hair, a pattern of light and dark can be seen on a properly placed screen. What phenomenon (phenomena) is (are) being observed? ,[object Object],[object Object],[object Object],[object Object],[object Object],(a) diffraction$

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Light Waves

3. . . . . . . . Consider several points on the wave front to be sources of secondary wavelets. . . . . . . .

8. AM band radio waves travel farther than FM band radio waves because (a) AM waves travel faster than FM waves (b) AM wavelengths are shorter than FM wavelengths (c) AM waves are scattered more than FM waves (d) AM waves are diffracted more than FM waves (d) AM waves are diffracted more than FM waves

10.

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Light Waves

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