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?