How does a green leaf appear in red light? use what you know about reflection and absorption of light.

1.black
2.green
3.greenish-red
4.red
5.white

1.black

Explanation:

A green object, like the leaf in this problem, absorbs all colors of light except for the green color. In fact, the object is able to reflect only the green light, and this is why the object appears green to us: because this is the only color reflected by the leaf.

Therefore, if we hit the leaf with red color, it will appear black: in fact, the leaf is will absorb the red light, and there are no more colors to be reflected - therefore, the leaf will appear black (which corresponds to absence of color).

yup its correct its: c) b b

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.