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borishaifa [10]
3 years ago
14

A beam of light is a mixture of plane polarized and unpolarized light. When it is sent through a polaroid sheet, it is found tha

t the transmitted intensity can be varied by a factor of 9 depending on the orientation of the polaroid. Find the relative intensities of the two components. A. 0.20 unpolarized, 0.80 plane polarized B. 0.25 unpolarized, 0.75 plane polarized C. 0.50 unpolarized, 0.50 plane polarized D. 0.60 unpolarized, 0.40 plane polarized E. 0.80 unpolarized, 0.20 plane polarized
Physics
1 answer:
Anarel [89]3 years ago
7 0

Answer:

A. 0.20 unpolarized and 0.80 plane polarized.

Explanation:

After passing through polaroid sheet , unpolarised portion will get reduced by half . So this portion becomes .20/ 2 = 0.10

The polarized portion can face two situation depending upon the angle of the polaroid.

It may either be cut off to zero. So total intensity of transmitted light  wil be .10 + 0 = .10

It may or be passed fully . In that case total intensity of transmitted light will become 0 .10 +0.80 =0.90

Ratio of these two light of maximum and minimum intensity is 0.90 / 0.10 = 9.

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3 0
3 years ago
a wire of a certain material has resistance r and diameter d a second wire of the same material and length is found to have resi
777dan777 [17]

Answer:

<h2>d₂ = 3d</h2><h2>The diameter of the second wire is 3 times that of the initial wire.</h2>

Explanation:

Using the formula for calculating the resistivity of an object to find the diameter.

Resistivity P = RA/L

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A is the cross sectional area

L is the length of the material

Since A = πd²/4

P = R( πd²/4)/L

P = Rπd²/4L ... 1

If the second wire of the same material and length is found to have resistance R/9, the resistivity of the second material will be;

P₂ = (R/9)A₂/L₂

P₂ = (R/9)(πd₂²/4)/L₂

P₂ = (Rπd₂²/36)/L₂

P₂ = (Rπd₂²)/36L₂

Since the length and resistivity are the same;

P = P₂  and L =L₂

Equating 1 and 2;

Rπd²/4L =  (Rπd₂²)/36L₂

Rπd²/4L =  (Rπd₂²)/36L

d² = d₂²/9

d₂² = 9d²

Taking the square root of both sides;

√d₂² = √9d²

d₂ = 3d

Therefore the diameter of the second wire is 3 times that of the initial wire

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3 years ago
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AysviL [449]

Answer:

the note is one of the harmonic frequencies for the shower.

I just took the quiz, this is correct. Hope this helps:)

Explanation:

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I believe it would be choice A. but not 100% possitive
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The diagram below shows the different phase transitions that occur in matter.
Margaret [11]

Answer:A

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7 0
3 years ago
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