Question 5 of 25 Which of the following means that a mirror is convex?
A. +d;
B. -d;
O C. +f
O D. -f

Option (c) : +f

Explanation:

Sign convention is based on cartesian system with Optical Centre as vertex, therefore, focal length of a convex mirror is +ive.

heats surface water up

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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