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MAXImum [283]
3 years ago
7

7. When initially-unpolarized light passes through three polarizing filters, each oriented at 45 degree angles from the precedin

g filter, _____ of the initial light passes through the last filter.
Physics
1 answer:
GREYUIT [131]3 years ago
7 0

Answer:

Explanation:

Let the intensity  of unpolarised light be I₀ . After passing through the first polarising filter , the intensity  is I₀ / 2 .

After second filter , the intensity  will be  I₀ / 2 x cos²45 =  I₀ / 4

After third filter , the intensity will be I₀ / 4  x cos²45 = I₀ / 8 .

So,

1 / 8 the of initial light passes through the last filter .

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The frequency and wavelength of EM waves can vary over a wide range of values. Scientists refer to the full range of frequencies
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Answer:

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Explanation:

For option D. The frequency range of microwave ovens is 2450 MHz = 2.4 GHz, which intersects with wireless internet technology with range of 2.4 to 2.6 GHz.

For E, wavelenght and frequency are inversely proportional. Wireless internet service has the greatest frequency band and hence the shortest wavelenght band.

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2.6 GHz = 2.6x10^9 Hz

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3 years ago
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aleksklad [387]

Answer:

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- public.nrao.edu

Explanation:

hope this helps

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