Physics Chapter 15

larger and further away

As the object moves towards the lens and approaches the focal point, the image becomes .....

parallel ; offset

Because the angle of refraction is the same, the exiting and entering rays are ________________; the exiting ray is just _______________

total internal reflection

Can occur when light moves from a medium with a higher index of refraction to one with a lower index of refractio

2.419 ; 24.4°

Diamonds have an index of refraction of ____ and a critical angle of ____

a diffrent amount

Each color is refracted by...

wavelength

Each color of light has a different _____

two

Every lens has _____ focal points, one on each side

a point image

For an object infinitely far away (incoming rays are parallel), what is formed

red light

From the raindrops high in the sky, ______ reaches the observers eyes and the droplet appears red

head on or 90 degrees

If light waves strike a boundary between two mediums _________________ (perpendicular to the boundary), the light waves continue in a straight line

at an angle

If light waves strike a boundary between two mediums _________________________ with the normal (theta i ), the light waves change direction

direction

If the car is at an angle, the difference in speed between the two roads will cause the car's ____ to change

hyperopia

Image position is further the retina; Person is said to be farsighted

myopia

Image position is in front of the retina; Person is said to be nearsighted

the point

In a converging lens, where do the rays meet

appear to originate

In a diverging lens, the rays will never meet thus it is the point from which the rays....

wavelength of light

Index of refraction depends on the....

from a paved road (fast speed) to a muddy road (slow speed)-

It helps to understand refraction if you think of light rays as a car transferring .....

refraction ; reflection

Lenses form images through _________, whereas mirrors formed images through _______

retina

Light is directed towards the light sensitive _____ in the back of the eye

product

Overall magnification is the _____________ of the magnifications of the separate lenses

dispersion

Rainbows are created by __________________ of light as the rays pass through water droplets

between the sun and a rain shower

Rainbows can be seen when the observer is positioned ..........

the change in velocity associated with a change in medium

Refraction is caused by....

in glass

Speed of light in air > ____ > in water

wavelength

The angle that light bends when entering a different medium depends on the _____________________ of the light

closer

The cat perceives the fish to be ___________ to the water's surface than it actually is

further

The fish perceives the cat on the pier to be ____________ from the water's surface than it actually is

slower

The larger the index of refraction is, the ________________ light travels in that substance

medium

The speed of light depends on the _____

toward

When light moves from a material in which its speed is faster to a material in which its speed is slower, the ray is bent _________________ the normal

away

When light moves from a material in which its speed is slower to a material in which its speed is faster, the ray is bent _________________ the normal

bent towards the normal at a certain angle

When light traveling in air enters glass, the light rays are.....

parallel ; point image

When rays that are ____ to the principle axis pass through a lens , the rays are bent, and a ___ forms at the focal point of the lens

curved

When the boundary is ____________, the normal line changes for each point along the boundary

bent away from the normal at the same angle

When the light exits the glass, the rays are .....

diverge and a virtual image is formed

When the object moves inside the focal point, the exiting rays ______ (the image appears on the same side as the object)

parallel and no image is formed

When the object reaches the focal point, the exiting rays are...

blue

____ light bends more than red light

bends less ; bends more

_______ROYGBIV______

Cornea

________ in conjunction with the lens, refracts light that enters the eye

lens

a transparent object that refracts light rays, causing them to converge or diverge to create an image

90°

angle of refraction is equal to...

mirages

are the result of refraction

refracted ; back ; front ; exits

as the ray enters the droplet, it is ______; the ray is reflected when it reaches the ____ of the droplet and returns to the ____ of the droplet; the ray undergoes refraction again when it ____ the droplet

totally internally reflected

because diamonds have a small critical angle, most of the light that enters a diamond is ______

The sun can be seen after it has passed below the horizon due to refraction of the sun rays as they enter the earth's atmosphere

describe atmospheric refraction

Worn over the cornea of the eye; Floats on a thin layer of tears

describe contact lenses

light is confined to traveling within transparent glass or plastic rods, which can be flexible; helpful in viewing images of inaccessible locations

describe fiber optics

always virtual and upright; always reduced in size; always found inside of the focal point

describe the image for a diverging lens

in different positions

due to refraction, object appear to be...

positive

focal length is ____________ for a converging lens

negative

focal length is ____________ for a diverging lens

larger

greater than one, the image is _______ than the object

density

heat from the ground heats the air above it leading to a change in _________ and a different refractive index

based on what happens to the light rays as they pass through the lens

how are lenses named

converging lenses

how is hyperopia corrected

a reflective surface

in tir, the ray is reflected at the boundary as though it struck _____

increasing

index of refraction decreases with ____ wavelength

one ; substance ; vacuum

index of refraction is always greater than ____ because light always travels slower in a _____ than a ____

reflected back to the most visible faces

jewelers cut diamonds so that the maximum light entering the upper surface is ______ of the diamond

combining a converging and a diverging lenses made of different types of glass

lens aberrations can be greatly reduced by _____

smaller

less than one, the image is_____than the object

diverging

myopia is corrected with what type of lens

boundary

refracted ray moves parallel to the....

angle of refraction

the angle between the refracted ray and the normal (theta r)

refraction

the bending of a wave disturbance as it passes at an angle from one medium to another

total internal reflection

the complete reflection of light at the boundary of two transparent media; this effect occurs when the angle of incidence exceeds the critical angle

focal length

the distance from the focal point to the center of the lens

lens aberration

the focusing of different colors of light at different distances behind a lens

the object for the second lens

the image formed by the first lens is treated as....

critical angle

the minimum angle of incidence for which total internal reflection occurs

dispersion

the process of separating polychromatic light into its component wavelengths

index of refraction

the ratio of the speed of light in a vacuum to its speed in a given transparent medium

compound microscope ; refracting telescope

two converging lenses

it disappears into the ground

what happens to the end of a rainbow?

From an airplane or the rim of a canyon

where can a complete circular rainbow be seen?