Physics Chapter 15 Notes

The index of refraction is always greater than ___

1

Angle of refraction =

90 degrees

If light waves strike a boundary between two mediums, _____ __ _________ with the normal, the light waves change direction __________ occurs

Angle of Incidence Refraction

The sun can be seen after it has passes below the horizon due to refraction of the sun rays as they entered the Earth's atmosphere

Atmospheric refraction

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

Away

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

Closer

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

Color

Two Converging lenses

Compound microscope

Worn over corner of eye, floats over a thin layer of tears

Contact Lens

Hyperopia is corrected with a __________ lens

Converging

In a __________ lens, it is a point where the rays meet

Converging

Lenses are named based on what happens to the light rays aa they pass through the lens, either __________ or __________

Converging Diverging

Lens Aberrations can be greatly reduced by combining a __________ and a _________ lens made of different types of glass

Converging Diverging

______, in conjunction with the lens, refracts light that enters the eyes

Cornea

the minimum angle of Incidence for which total internal reflection occurs

Critical angle

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

Curved

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

Density

Rainbows and created by __________ of light as the rays past through water droplets

Dispersion

the process of separating polychromatic light into its component wavelengths

Dispersion

Myopia is corrected with a _________ lens

Diverging

in a __________ lens, the rays will never meet thus it is the point from which the rays appear to originate

Diverging

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

Fiber optics

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

Focal Length

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

Further

Critical angle calculation can only be used when ni is _______ than nr

Greater

Image is behind the retina, person is said to be farsighted

Hyperopia

People who cut jewels

Lapidaries

Converging Lens As the object moves towards the lens and approaches the focal point, the image becomes ______ and _______ away

Larger Farther

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

Lens

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

Lens Aberrations

_______ are the result of refraction

Mirages

Blue light bends ____ than red light

More

Image is in front of retina, person is said to be nearsighted

Myopia

Converging Lens When the object reached the focal point, the editing rays are parallel and __ ______ is formed

No image

The image formed by the first lens is seen as the ______ for the second lens

Object

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

Optical phenomena

Because the angle of refraction is the same, the exiting and entering rays are ________; the editing ray is just off set

Parallel

Refracted ray moves ________ to the boundary

Parallel

If light waves strike a boundary between two mediums _____________ to the boundary, the light waves continue in a straight line No __________ occurs

Perpendicular Refraction

Converging Lens From an object infinitely far away (incoming rays are parallel), a _____ image is formed

Point

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

Point

Objects appear to be in different _________ due to refraction

Positions

Thin lens Focal length is ________ for a converging lens Focal length is ________ for a diverging lens

Positive Negative

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

Product

_______ can be seen when the observer is positioned between the sun and a rain shower

Rainbows

Snell's Law The index of refraction (N) from the two materials at a boundary can be used to determine how much a ray of light will _______ as it passes through the boundary

Refract

Two converging lenses

Refracting telescope

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

Refraction

Lenses form images through __________ while mirrors form images through __________

Refraction Reflection

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

Retina

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

Total internal reflection

When light moves from a material in which its speed is higher to a material in which its speed is lower, its ray is bent ______ the normal

Toward

Every lens has ___ focal points, one of each side

Two

Converging Lens When the object moves inside the focal point, the editing rays diverge and a _______ image is formed

Virtual

Each color of light has a different __________ Each color is _________ by a different amount

Wavelength Refracted

the angle between the refracted ray and the normal

angle of refraction

When the light exits the glass, the rays are bent ____ from the normal at the same angle

away

n = c / v

c = speed of light in a vacuum v = speed of light in a medium

Index of refraction decreases with __________ wavelength

increasing

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

index of refraction

The speed of light depends on the ______

medium

The larger the index of refraction is, the ______ light travels in a substance

slower

When light traveling in air enters glass, the light rays are bent _______ the normal at a certain angle

towards

Refraction is caused by a change in ________ associated with a change in the ______

velocity medium