Unpolarized light passes through two polarizers. find the fraction of light from the first polarizer that gets through the second when the angle between their transmission axes is 60 degree.

1/4

Explanation:

Let I₀ be the intensity of polarised light from first polariser . After first polarisation, in the second polarisation, intensity changes as follows

I = I₀  Cos² θ⁰

I = I₀  Cos² 60⁰

=  I₀  1 / 2² = I₀ / 4

So , 1/4 or one fourth of intensity from first polariser gets through the second polariser.

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this could be newton#'s law of cooling. the cooling curve is exponential