Answer:46.5
Explanation:is the topical formula of F= 30x+15
It bends light rays outward.<span>A concave lens causes light rays passing through to spread apart.</span>
Acceleration due to gravity depends directly on the mass of Earth and inversely to the square of radius of Earth.
Answer:

Explanation:
Given that
Angle ,θ = 30°
From Malus law,Intensity given as

Io=Intensity of unpolarized light
I=Intensity of emerging light
Now by putting the value of angle


We know that



Therefore ratio will be 