physics ch 22
Terms in this set (101)
causes light rays come together
A converging lens ALWAYS:
The light ray that strikes the surface of an optical device is known as the ____ ray.
The type of reflection in which the light is scattered into many directions is known as:
All of the following statements about perfectly polished surfaces are true EXCEPT:
a. the surface itself seems invisible.
b. the surface creates diffuse reflection.
c. all parallel light rays from a source are reflected parallel by the surface.
d. the surface creates specular reflection.
Simple optical devices include lenses, mirrors, and:
The line drawn on a ray diagram perpendicular to the surface at the point where the incoming light strikes the surface is called the:
All of the following statements correctly describe light rays EXCEPT that light rays:
a. can be seen coming from a light by squinting your eyes.
b. can be used to predict the size and location of an image.
c. are often represented with arrows on ray diagrams.
d. are imaginary lines which represent a thin beam of light.
equal to the angle of reflection
According to the law of reflection, the angle of incidence is always:
The color of light that is refracted most when it passes through a prism is:
along the optical axis
A light ray passes through a converging lens, but does not bend. Describe its path.
When photographic film is exposed to light, the image produced on film is called a:
Lenses that are thicker around the edges of the lens than in the middle are:
The type of image that can be projected on a screen is always:
A lens is used to produce an image of an object. If the object is 4 centimeters tall and the image is 12
centimeters high, the magnification of that lens is:
closer to the lens than one focal length.
A virtual image of an object will be produced by a converging lens if the object is placed:
smaller and right side up
The image produced by a diverging lens is always:
How many numbers must be stored in order to record a 3 megapixel colored image on a CCD?
When a wave moves through a medium, only ______________ moves from place to place.
Some waves, such as ____________ do not require a medium.
Light waves can travel through a ________________
All waves carry
Waves travel through a medium in ________ lines.
When a wave moves from one medium to another at an angle, it ___________ or __________.
The bending of a wave is called
Refraction is caused by a change in
The speed of the light wave ______________ when it moves from water into air.
When a wave moves at an angle from a less dense medium to a more dense medium, it is bent
Waves transfer __________ from place to place.
Most waves travel through a substance called a
The angle at which a wave strikes a barrier is the angle of ___________
Waves are refracted when they move from one ________ to another.
When a wave is refracted it is
b. bounced back
d. spread apart.
A wave is refracted when its
A. amplitude changes
b. frequency changes
c. speed changes
d. wavelength changes.
Light travels _________ than sound.
A flash of lightning can be seen _________ the sound of thunder can be heard.
A _____ of light shows the direction of a light bulb.
Light is a form of ______________ energy.
Light travels fastest in a ________.
An object that casts a shadow is an ____________ object.
A sheet of clear glass is ________________ because it allows light to pass through.
true or false: Electrical impulses travel along the optic nerve to the brain
the opening that lets light into the eye
clear protective layer over the eye
the eye is a ________ organ
an image on the ______ is upside down
On a windy day, the surface of a pond will form a _________ reflection.
The angle of incidence is equal to the angle of _______________
If the incident ray striking a mirror is at 45⁰ angle, the ____________ ray will be at a 45⁰ angle.
When light strikes an object, the light will be either ______________ or reflected.
a smooth surface that reflects light and forms images
a _________ lens forms inward
a _______________ can be projected on a screen
a _____________ lens forms outward
where rays of light are brought together by a convex lens
the distance from the focal point to the lens
The image formed by a smooth surface is an example of _________________
bends parallel light waves apart
bends parallel light waves together
Light waves from a distant light will pass through a convex lens and come together at the ____________
An object and its ______________ image are always on the same side of a lens.
Only a _________ image can be focused on a screen.
A concave lens will not form a _______ image.
A ___________ image is formed when an object is very far from a lens.
To make a virtual image, an object must be placed __________ the focal length of a convex lens.
The ___________ lens in a camera forms a real image on photographic film.
A camera lens is moved _________ to the film in order to see distant objects clearly.
In a microscope, the upper lens forms a larger ___________ image of the real image produced by
the lower lens.
A _____________ uses two lenses to make a distant objects appear larger.
Inside an eye, ___________ control the thickness of the lens.
When the eye is too short to focus close objects, the condition is called
To correct _________________, a person could use the glasses with concave lenses.
A magnifying glass is a
The image your eye receives is
If a person's eyes cannot form sharp image at any distance, the person
in front of the retina
The eyes of nearsighted people focus light
Farsighted people need to wear glasses that contain
figure out where an image will be located
Ray diagrams are used to
An image formed by a single diverging lens...
An image of a distant object formed by a singe converging lens
a. is upside down
b. can be focused on a screen
c. is real
d. all of the above
the angle of reflection from a mirror equals the angle of incidence
The law of reflection says that
virtual and upright
The image formed by a plane mirror is
A person standing waist-deep in a swimming pool appears to have short legs because
the same speed
Different colors of light travel at different speed in a transparent material. In a vaccum,
different colors of light travel at
A beam of light travels fastest in
either real or virtual images
convex lens can produce
Which of these is true about a real image?
a. It is reversed.
b. It is enlarged.
c. It can be projected on a screen.
d. It appears behind the mirror
Suppose you stay 2 m in front of a plane mirror. How far away from you is your image
The straight line through the center of a convex lens and the focal points is called the
image that appears to come from behind a mirror
the angle between the reflected ray and the normal line
angle of incidence
the angle between the incident ray and the normal line
angle of refraction
the angle between the refracted ray and the normal line
true or false: The eye contains a diverging lens that focuses light.
true or false: A nearsighted person needs to wear glasses that have converging lenses in them.
true or false: A real image formed by a single converging lens is always upside down.
true or false: When you look at the image of a candle in a plane mirror, you see a virtual image.
true or false: The image you see in a plane mirror is reversed from left to right.
true or false: The speed of light is greater in water that in air.
true or false: Once light passes from a vacuum into any medium, it slows down.
true or false: The angle of incidence is greater than the angle of reflection.
true or false: Your image appears to be the same distance behind a mirror as you are in front of it.