Answer:
Ratio will be
Explanation:
We have given that intensity level is increases from 23 dB to 61 dB
We know that level of intensity is given by

So
------eqn 1
And
------eqn 2
Subtracting eqn 1 from eqn 2


Answer:
it is a the answer is a btw
Explanation:
Answer:
Explanation:
Let the angle between the first polariser and the second polariser axis is θ.
By using of law of Malus
(a)
Let the intensity of light coming out from the first polariser is I'
.... (1)
Now the angle between the transmission axis of the second and the third polariser is 90 - θ. Let the intensity of light coming out from the third polariser is I''.
By the law of Malus

So,



(b)
Now differentiate with respect to θ.


Answer:
Solids
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