Light and optics
If a wave has a frequency of 0.05 hertz and a wavelength of 10 meter,what is the waves speed
0.5 m/s
The speed of light in water is 2.26 * 10^8 m/s. What its index of refraction
1.33
light enters a piece of glass from air at an angle of 20 degrees. It refracts at an angle of 14 degrees. Find the index of refraction of the glass.
1.41
Light passes from air into another medium at 30.0 to the normal. If the angle of refraction is 18.0, what is the index of refraction of the new medium?
1.62
If a wave has a frequency of 0.05 hertz and a velocity of 0.5 m/s, what is the wavelength
10M
An object is placed in front of a convex lens with a 7.00 cm focal lengt,if the object distance is 15.0 cm,what is the image distance?
13.1 cm
If light passesfrom air into water at 40.0 degrees to the normal,what is the angle of refraction?
28.9 degrees
If a light ray reflects off a plane mirror at an angle of 30 degrees to the normal, what is the angle of incidence of the ray ?
30 degrees
A radio station broadcast at a fequency of 950,000 hz. Knowing that the radio waves have a speed of 3.01 * 10^8 m/s, what is the wavelength of these waves
316.84M
A wave traveling at a speed of 200m/s has a wavelength of 0.05m. What is its frequency
4000 HZ
A light beam passes from flint glass (n= 1.62) into ethanol (n=1.36). What is the critical angle for total internal reflection of the light beam ?
57.1 degrees
Describe the orientation of that attached image
Real,inverted,larger
Which statement best describes how a rainbow is produced
airborne water droplets reflect each wavelength of light a slightly different amount causing the colors to seperate
what color pigment is seen after mixing red pigment and cyan pigment
black
Which color carries the most energy in a single photon
blue
White light contains which colors
blue,green,red
Electromagnetic waves
can travel through a vacuum
___________________ are responsible for detecting color
cones
what light is seen when blue light is mixed with green light
cyan
Which type of wave is a light wave
electromagnetic wave
light is an example of which kind of wave
electromagnetic wave
When electrons move from a higher level of the electron orbit to a lower,the atom will
emit light
The two ways that we see light are
emitted or reflected
Infrared waves are responsible for sunburn
false
When red,green, and blue light are combined,the color black would be seen
false
When red,green,and blue light are combined,the color black would be seen
false
If the sun were to disappear right now,we wouldn't know for about 8 minutes because it takes 8 minutes
for light to travel from the sun to the earth
Different colors of light correspond to different light
frequencies
The number of waves or cycles per sec. inverse of the period
frequency
Which of the following electromagnetic waves has the highest frequency
gamma rays
which of the following electromagnetic waves has the highest frequency
gamma rays
What determines whether a surface produces a specular reflection or a diffuse reflection?
how smooth the surface is relative to the wavelength of the light
how to tell if an image is upright or inverted
image on opposite sides is upright,and an image on the same side is inverted
Are convex mirrors real or virtual
in a convex mirror the image is always virtual
Heat lamps give off mostly
infrared
a negative indicates that the image is
inverted
Which statement is true about the image produced by a plane mirror?
it appears to have reversed front and back,relative to the object
light enters glass (n=1.5) fromwaters (n=1.3) at a 30 degree angle. What is the refraction angle of the light?
less than 30 degrees
Total internal reflection occurs when the incident angle is greater than the critical angle and
light is going from a high to low index of refraction
Total internal reflection occurs when the incident angle is greater than the critical angle and
light is going from a high to low index refraction
What type of magnification is produced by a plane mirror
no magnification
Linearly polarized light consists of waves _________________ in the same place
oscillating
Which of the following lists of electromagnetic waves is in order of increasing energy
radio,microwave,infrared,visible,ultraviolet,gamma
Image that is located on the sameside of the mirror as the object
real and inverted
Which of the following colors of visible light has the longest wavelength
red
which set of colors constitute the primary light colors
red,blue,green
The diagram shows rays of light reflected from a convex mirror. Which describes the image size and orientation for this mirrpr?
reduced, upright
Which of the following is not an electromagnetic wave
sound waves
The law of reflection says that
the angle of reflection is equal to the angle of incidence
A diverging lens is needed for nearsighted people because
the eye is focusing light in front of the retina
When the image distance is negative,the image is behind the mirror
the image is virtual and upright
what happens when light enters a region with a higher index of refraction?
the light slows down and bends toward the normal
The source of all elctromagnetic waves is
the movement of electrons
What does the letter "c" represent in this unit?
the speed of light
Which of the following explains the law of reflection?
the wave model of light
light follows the law of reflection because of the way light waves reflect from surfaces
the wave model of light
Infrdred waves are respomsible for suburn
this is FALSE because ultraviolet light is responsible for sunburn
What type of wave has a wavelength
transverse and longitudinal
Diffuse reflection occurs when light is reflected in many directions from a rough surface
true
Ultraviolet light can cause cataracts
true
the distance ligt travels in one year is called a light year
true
The diagram below represents a concave mirror with an object located between the focal point, F and the surface of the mirror. What type of image is produced when the object is in this position?
upright, enlarged , and virtual
Which of the following colors of visible light carries the most energy
violet
when red,green,and blue light is combined it creates
white light
the three primary colors of pigment color subtraction are
yellow,cyan,and magenta