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Colt1911 [192]
4 years ago
12

What happens to a light beam that passes through a polarizing crystal? What happens when plane-polarized light passes through a

second polarizing crystal set perpendicular to the first crystal?
Physics
1 answer:
levacccp [35]4 years ago
5 0

Answer:

it gives rise to vibrating in one plane.when light passes through second polarizing crystal no light passing through.

Explanation:

in the second polarizing crystal only darkness emerges.

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Answer:

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3 years ago
A loudspeaker, mounted on a tall pole, is engineered to emit 75% of its sound energy into the forward hemisphere, 25% toward the
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Answer:

"0.049 W" is the correct answer.

Explanation:

According to the given question,

r = \sqrt{(3.5)^2+(2.5)^2}

  =\sqrt{8.5}

SL=85

As we know,

⇒  SL=10 \ log(\frac{I}{I_o} )

     85=10 \ log(\frac{I}{10^{-12}} )

      I=3.162\times 1^{-4} \ W/m^2

Now,

⇒  P_{front} = I(2\pi r^2)

               =(3.162\times 10^{-4})(2\pi\times 18.5)

               =0.0368 \ W

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or,

                =0.049 \ W

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