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