because it speeds up, which causes it to bend

because it slows down, which causes it to bend

because it hits a dense medium, which causes it to bounce off

because it gets absorbed, which causes it to lessen in intensity

Glass is less transparent than water, which is less transparent than air.

Light will be transmitted into the new medium each time it reaches a boundary.

A light wave reflects off molecules as it travels, this causes the light to bend.

The speed of a wave slows as it travels at different speed in different media.

A convex lens is another way to describe a plane mirror; a concave lens is curved

A concave lens is curved inward on both sides; a convex lens is on only one side

A convex lens has a thick center and thin edges, a concave lens has a thin center and thicker edges

A convex lens has a thin center and thick edges. a concave lens has a thick center and thinner edges

They are opaque

They refract light

They reflect light

That are translucent

When light travels from a less dense to a more dense medium

When the angle of incidence is smaller than the critical angle

When the angle of incidence is greater than the critical angle

When the light cannot pass through a medium

Mirage; angle of incidence

Optical fibre; refractive index

Lateral inversion; angle of reflection

Mirage; refractive index

negative because it can form real images

positive because it can form real images

negative because it can form virtual images

could be positive or negative depending on the image formed