What is the function of the muscles around the lens in the human eye? They send signals to the brain.
D They control the amount of light that passes through the lens.
They focus light rays onto light-sensor cells at the back of the eye.
They change the shape of the lens.

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?