Light and optics

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refraction can occur if ni is not equal to nr or if 0i is not equal to 0

...

For spherical mirrors, how many reference rays are used to find the point?

2

calculate the speed of light in quartz. the index of refraction (n) is 1.46

20547952.1 or 2.05 E 8

the primary colors of light are

Red, blue, green

What type of image is produced by an object that is FAR from a concave spherical mirror?

Smaller and inverted

the ___ of light is a defined value in a given medium

Speed

T/F An image is formed by the convergence of refracted or reflected light

True

The image formed by a diverging lens is always:

VUS/VUR: virtual, upright, reduced

All of the following descriptions about images formed byconvex spherical mirrors are true except which one? a. they are formed by converging rays b. they are reduced c. they are always virtual d. their image distance is always negative

a.

using the primary colors of light to produce other colors is an ____ process

additive

according to the law of reflection the angle of incidence and the angle of refraction

are equal

if light passes from glass into air (Slower to faster), the ray will

bend away from the normal

When light moves from a material in which its speed is higher into a material in which its speed is lower, the ray is

bent toward the normal

An object is located in FRONT of a CONCAVE spherical mirror between the center of curvature and the focal point. Where is the image located?

beyond the center of curvature

are capable of producing larger images

concave mirrors, and converging lenses

Are capable of producing REAL images

converging lenses, and concave mirrors

mirrors in store to prevent kids from stealing candy (Passenger side mirror)

convex mirror (on top)

in order for refraction to occur, all of the following conditions must be met except which one? a. light rays strike the medium at an angle b. light crosses the boundary that seperates the medium c. light travels from one transparent medium to another d. light rays strike the medium parallel to the normal

d.

the size and location of an image formed by an converging lens depends on the a. location of the object in reference to the lens b. location of the image in relation to the lens c. location of the observer in relation to the lens d. all of the above

d.

converging lens

depends

can only produce images that are smaller than the object

diverging lenses, and convex mirrors

ONLY produce virtual images

diverging lenses, plane mirrors, convex mirrors

Light is a ____ wave

electromagnetic

the index of refraction for a material varies

inverseley with the velocity of light through the MATERIAL (not of light in a vacuum)

concave mirror

makeup mirror- depends

the image formed by a concave mirror

may be real or virtual depending on the distance the object is from the mirror

convex mirror

passenger side mirror-virtual, upright, smaller

capable of producing images the same size as the object

plane mirrors, converging lenses, and concave mirrors

What distinguishes a real image from a virtual image

real images can be displayed on a surface, whereas virtual images cannot

the image of an object located 20 cm away from a concave mirror with a focal length of 15 cm is

real, inverted, larger

The image of an object located 30 cm away from a concave mirror with a focal length of 15 cm is

real, inverted, smaller

contrast reflection and refraction

refelction: the change in direction of the light refraction: the BENDING of wavefront as it passes through two substances of which the wavespeed differs.

When you hold a small plane mirror close to your face, your nose barely fits in the mirror, when you move the mirror an arms length away from you, you can see

still just your nose

which factor determines the foc al length of a curved mirror

the curvature of the mirror

The dish is merealy a concave reflector, where should the receiving sensor be placed to receive the strongest signal?

the focal point

The index of refraction is the ratio of

the speed of light in a vacuum verses the speed of light in a medium

Flat mirror

upright virtual same size

in a vacuum, redlight and blue light have the same

velocity

diverging lens

virtual, smaller, upright

The image of an object located 20 cm away from a converging lens with a focal point of 15 cm is

virtual, upright, bigger

(makeup mirror) the image of an object located 10 cm away from a concave mirror with a focal length of 15 cm is

virtual, upright, larger

(passenger side mirror) the image of an object located 30 cm away from a convex mirror with a focal point of 15 cm is

virtual, upright, smaller

When the primary colors of light are combined, the color is

white

T/F If an object is located in front of a focal point, there is no image

False

T/F If reflected or refracted rays diverge, there is no image

False

T/F Just three rays of light from an object can intersect at the image location

False

T/F Virtual images cannot be seen

False


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