2.4 The Ray Model of Light

True or False?

Light travels in a straight line.

• True

• False

When light is transmitted through an object, that means

• Light is completely absorbed by the object.
• Light is reflected off the surface of the object.
• Light is scattered in all directions by the object.
• Light passes through the object without significant absorption or reflection.

When light is reflected off an object, that means

• Light is creating heat in the object.
• Light is bouncing off the surface of the object.
• Light is traveling through the object.
• Light is absorbed by the object.

If light is absorbed by a material,

• it passes through the material

• it reflects off the material

• it is neither transmitted or reflected off the material

• it changes color

If a material is transparent, then light

• reflects off the material
• passes through the material
• is completed absorbed

• scatters in different directions

If a material is translucent, then light

• passes through without any scattering
• cannot pass through at all
• is completely absorbed by the material
• can pass through but is scattered

If a material is opaque, then light

• is reflected completely
• is blocked or absorbed
• is transmitted without any change
• is scattered in all directions

Mirrors are objects that

• are transparent

• are opaque

• absorb sound

• reflect light to produce an image

A plane mirror is

• A colored plastic panel.
• A flat reflective surface.
• A transparent glass sheet.
• A curved reflective surface.

An incident ray is

• a ray of light that strikes a surface
• a ray of light that travels parallel to a surface
• a ray of light at a certain point in time

• a ray of light that reflects off a surface