Light and optics
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
