The Physics of Waves: Light Waves, Sound Waves and Ultrasound

Sound frequency (pitch)

Sound intensity (energy)

Sound pressure

Sound level (loudness)

Sound level uses the unit dB. Frequency uses hertz, intensity uses watts per square metre, and pressure uses pascal.

Author: rikazzz Comment

The effect on light rays as they enter the cornea of the eye

Light rays from an object meeting at a point to form a sharp image

A light ray travelling away from a surface at the same angle that the light ray approached the surface

A light ray travelling through a glass with a faster speed than it would have in air

The cornea bends (refracts) light that enters the eye.

Author: rikazzz Comment