Light and Color

Convex mirrors

Produced a virtual image that is smaller than the object

Opaque

A material that reflects or absorbs all of the light that strikes it is called opaque. The color of an opaque object is the color of the light it reflects. The color of a transparent or translucent object is the color of the light it transmits.

Translucent

A material that scatters the light that passes through it is called translucent.

Transparent

A material that transmits most of the light that strikes it is called transparent.

Plane mirrors

A plane mirror produces a virtual image that i upright and same size as the object its reflecting

Complementary colors

Any two colors that combine to form white light are called complementary colors.

Concave mirrors

Concave mirrors can produce real or virtual images and the object appears bigger

Mixing pigments

Cyan, yellow, and magenta are the primary colors of pigments. When the three primary colors of pigment are combined in equal amounts, they produce black.

Pigments

Inks, paints, and dyes contain pigments, colored substances that are used to color other materials. Pigments absorb some colors and reflect others. The color you see is the result of the colors that particular pigment reflects

Regular reflection

Parallel rays of light hit a smooth surface

Diffuse reflection

Parallel rays of light hit an un even surface

Mixing light

The primary colors of light are red, green, and blue. When the three primary colors of light are combined in equal amounts, they produce white light.

Primary colors

Three colors that can combine to make any other color are called primary colors.

Refraction could not occur if light traveled at the same speed in every medium

True

Secondary colors

Two primary colors combine in equal amounts to produce a secondary color.

Reflection

When light bounces back from an object

Refraction

When light rays enter a new medium at an angle, the change in speed causes the rays to bend

Types of materials

When light strikes an object, the light can be reflected, transmitted, or absorbed.

A material that reflects or absorbs all the light that strikes it a) opaque b) transparent c) translucent d) primary

a) opaque

Parallel light rays passing through a concave lens always meet

always - never

Convex

bigger

Complementary colors are a) colors that combine to form a secondary color b) all the colors of the rainbow c) any two colors that combine to form white light d) colors that cannot be split into component colors

c) any two colors that combine to form white light

Transparent or translucent materials are used to make a) stop signs b) suitcases c) color filters d) toothbrushes

c) color filters

The type of image formed by a convex lens is determined by the object's a) transparency or opaqueness b) translucence or transparency c) position relative to the focal point d) position relative to the optical axis

c) position relative to the focal point

The type of image formed by a lens is determined by a) the index of refraction b) the brightness of the light passing through it c) the shape of the lens and position of the object d) the surface onto which the image is projected

c) the shape of the lens and position of the object

A mirage forms when a) regular reflection occurs b)light rays are bent by water in the air c) light passes into a medium with a greater density d) light refracts as it moves from hot air near the ground to cooler air above

d) light refracts as it moves from hot air near the ground to cooler air above

The three colors that can be used to make any other color are a) universal colors b) complementary colors c) secondary colors d) primary colors

d) primary colors

As a rainbow is formed light a) refracts and forms a virtual image b) refracts and forms a real image c) reflects as from plane mirror d) refracts and reflects

d) refracts and reflects

When white light shines through a green glass bottle, the bottle appears magenta

magenta - green

A clear glass window is transparent, but a fogged-up glass window is opaque

opaque - translucent

A lens is a curved piece of glass or other opaque material that refracts light

opaque - transparent

When white light enters a prism, each wavelength is reflected by a different amount

reflected - refracted

Concave

smaller

Metal and tightly woven fabric are examples of translucent materials

translucent - opaque

Green and blue are primary colors that combine in equal amounts to produce cyan

true

Light rays passing through a convex lens parallel to the optical axis are bent toward the center of the lens.

true

The color of ink that you see is result of the color that the pigment in the ink reflects

true

The faster light travels through a medium, the lower is the medium's index of refraction

true

In yellow light, a red scarf appears white

white - black