Chapter 14
Explain how the focal length of a convex lens changes as the sides of the lens become less curved.
Increase
Infer how the amount of light that enters the eye from an object changes as the object moves closer
More light and more detailed image.
If image formation by a convex lens is similar to image formation by a concave mirror, describe the image formed by a light source placed at the focal point of a convex lens.
No image formed just a beam of light
Can a virtual image be photographed
Yes
when an object is less than ___ focal length away from the lens, the image is no longer real
one
imaginary straight line down perpendicular to the surface of a mirror at the center
optical axis
flat smooth mirror
plane mirror
light enters your eye through the ___
pupil
formed when light rays converge to form an image
real image
uses concave mirror, plane mirror, and convex lens, and light gathered from distant objects
reflecting telescope
what uses a lens and two mirrors
reflecting telescopes
a simple ___ telescope uses two convex lenses to gather and focus light
refracting
uses two convex lenses to gather and focus light from distant objects
refracting telescope
what uses a long-focal-length lens, a short-focal-length, and has an inverted image
refracting telescope
inner lining of your eye
retina
the film in a camera is like the ___ in the human eye
retina
because they bend light more, thick convex lenses have ___ focal lengths than thin convex lenses
shorter
electrical power for the hubble space telescope is provided by ___
solar panels
t/f all lens refract the light that passes through them
t
t/f the concave mirror in a flashlight produces light rays that do not converge
t
t/f the hubble space telescope has produced images that are SHARPER than the images the most powerful telescope on earth can produce
t
t/f the image formed by a concave mirror changes the depending on the FOCAL LENGTH of a mirror
t
t/f using the focal point and the optical axis, you can diagram how some of the light rays that travel to a concave mirror are reflected
t
the image formed by a plane mirror is ___
upright and reversed
a ___ image cannot be projected onto a screen
virtual
an image which your brain perceives even though no light rays pass through it, is called a ___ image
virtual
image is perceived even though no light rays pass through it
virtual image
a girl stands 3m from a plane mirror. Describe the image by the mirror, including it's locations
virtual, upright, reversed 3m
a ___ lens has a short focal length and produces a small image that indicates much of the surroundings
wide angle
what is not true about a real image
it appears behind the mirror
a ___ bend light rays to form an inverted image on the retina
lens
muscles in the eye can change the shape of the ___
lens
uses two convex lens with relatively short focal lengths to magnify small close objects
microscope
any smooth surface that reflects light to form an image is an ____
mirror
explain why your perception of distance can be distorted in a convex mirror
mirror- makes light spread out allowing you to see a larger area, thus making objects look smaller
How does your image change as you get closer to the mirror
Gets bigger
t/f the distance from the center of a mirror to the focal point is called the reflection length
F
What optical instrument forms images in a way, most like your eye and why
Camera. Can see near and far.
Identify the advantage to making the objective lens larger in a refracting telescope
Clearer with more light
explain how the focal length of the lens in the eye changes to focus on nearby objects.
Decrease
Explain why the largest telescopes are reflecting instead of refracting telescopes
Easier to stabilize Larger mirror than larger lens
a farsighted eye focuses an image ___
behind the retina
nearsightedness can be corrected with a ___ lens
concave
the bowl of a shiny spoon forms an enlarged, upright image similar to that of a ____ mirror
concave
light is spread out and refracted by a ___
concave lens
thinner in the middle than on the edges
concave lens
surface of a mirror is curved inward
concave mirror
outside rear-veiw mirrors on automobiles are generally ___
convex
the image produced by a ___ mirror is upright and smaller than the actual object
convex
___ are thick in the middle and thin at the edges
convex lens
thicker in the middle than on the edges
convex lens
mirror that curves outward
convex mirror
a ___ gathers light through a lens and projects an image onto film
cornea
transparent covering on your eye that light enters through
cornea
light rays that hit a convex mirror ___ as they are reflected
diverge
t/f the type of image formed by a convex lens depends on the location of the object relative to the optical axis
f
t/f the hubble Space telescope was built to overcome the MAGNIFICATION of earths view through the atmosphere
f blurryness
t/f a WIDE ANGLE lens used for a camera has a long focal image
f telephoto
distance from center of mirror to the focal point
focal length
every light ray traveling parallel to the optical axis as it approaches the mirror is reflected through a point on an optical axis
focal point