Unit 10 (Light and Mirrors)

Which is a true statement regarding how objects can be seen? a) A luminous source emits its own light b) An illuminated source emits its own light c) A luminous source reflects light from another source d) Both luminous and illuminated sources emit their own light

a) A luminous source emits its own light

the order of the EM wave from lowest frequency to highest is a) TV, micro, infrared b) gamma, x-ray, micro c) UV, visible light, infrared

a) TV, micro, infrared

If an overhead projector was enlarging the object it projected, the object would be___ a) between f and 2f b) outside 2f c) at f d) at 2f e) inside f

a) between f and 2f

A lens that diverges parallel light rays is a___lens a) concave b) convex c) magnifying d) telescopic

a) concave

if the image is virtual and reduced, then it must come from a___lens a) concave b) convex c) magnifying d) telescopic

a) concave

Convex lenses tend to___light rays a) converge b) diverge c) diffract d) polarize

a) converge

the waves with the highest frequency are____waves a) gamma b) microwaves c) radio d) x-ray

a) gamma

A concave mirror produces a smaller, inverted, real image. Which is true regarding the image distance? a) it is between the radius of curvature and the focal point b) it is closer to the mirror than the focal point c) it is at the focal point d) it is farther away than the radius of curvature

a) it is between the radius of curvature and the focal point

As you shine a beam of light through a prism, the colors of the spectrum are seen because___ a) the different wavelengths of the colors each bend different amounts b) the prism produces different colors when you shine light at it c) as the light reflects, different colors reflect differently

a) the different wavelengths of the colors each bend different amounts

Which is formed by divergent rays? a) virtual image b) real image c) focal point d) object

a) virtual image

By adding red light and green light you would produce___light a) yellow b) cyan c) magenta d) blue

a) yellow

Fiber Optics allows us to send information through fiberglass fibers using which of the following a) total internal reflection b) the incident angle is such that the refracted angle would be greater than 90 degrees c) the light is traveling through a substance which is more dense than the air outside of the material d) all of the above

d) all of the above

If a real image if the same direction from the mirror as the object, then the object is located___ a) between f and 2f b) outside 2f c) at f d) at 2f e) inside f

d) at 2f

The incident angle at which you will have a refracted angle of 90 degrees and total internal reflection is called the___ a) adjacent angle b) normal c) angle of refraction d) critical angle

d) critical angle

A concave mirror produces a larger, inverted, real image. Which is true regarding the image distance? a) it is between the radius of curvature and the focal point b) it is closer to the mirror than the focal point c) it is at the focal point d) it is farther away than the radius of curvature

d) it is farther away than the radius of curvature

If one were to place an object at the focal point of a convex lens, the image would be___ a) reduced, real, upright b) enlarged, real, inverted c) enlarged, virtual, upright d) not formed

d) not formed

Which term describes a material that does no allow light to be transmitted? a) translucent b) transparent c) polarized d) opaque

d) opaque

What is the nature of an image formed by a concave mirror of focal length 10cm for a real object placed 3cm from the mirror? a) real and inverted b) real and upright c) virtual and inverted d) virtual and upright

d) virtual and upright

Under which conditions does a concave mirror produce an enlarged virtual image? a) never b) when the object is farther away than the focal point c) when the object is father away than the radius of curvature d) when the object is between the focal point and the mirror

d) when the object is between the focal point and the mirror

If an image is virtual and enlarged, then the object must be___ a) between f and 2f b) outside 2f c) at f d) at 2f e) inside f

e) inside f

The focal length of a spherical mirror is____the radius of curvature of the mirror. a) twice b) half c) the same as d) unrelated to

b) half

Light has one of either its horizontal or vertical components of EM removed is said to be___ a) diffracted b) polarized c) magnified d) quantified

b) polarized

Which is formed by convergent rays? a) virtual image b) real image c) focal point d) object

b) real image

White light is made from the primary colors___, ____, and ___ a) cyan, magenta, yellow b) red, blue, green c) violet, yellow, red d) red, blue, yellow

b) red, blue, green

Which type of image is produced by a convex mirror? a) enlarged and real b) reduced and virtual c) enlarged and virtual d) reduced and real

b) reduced and virtual

As a ray of light passes from one substance into a more dense substance (thereby slowing), the light will bend___ a) toward the normal b) away from the normal c) none

toward the normal

Visible light, infrared and ultraviolet are___ a) all waves that we can see b) all Electromagnet Waves c) all, visible, but Visible Light is not an EM wave

b) all electromagnetic waves

By definition, which has type of mirror has its edges curved toward the object? a) plane mirror b) concave mirror c) convex mirror d) spherical mirror

b) concave mirror

A lens that converges parallel light rays is a___lens a) concave b) convex c) magnifying d) telescopic

b) convex

By mixing green light and blue light one would produce___light a) yellow b) cyan c) magenta d) blue

b) cyan

The bending of light around corners as it passes through slits is called___ a) polarization b) diffraction c) magnification d) refraction

b) diffraction

the order of the EM waves from shortest wavelength to longest is a) radio, TV, micro b) gamma, x-ray, micro c) UV, x-ray, gamma

b) gamma, x-ray, micro

Which type of mirror has its edges curved away from the object? a) plane mirror b) concave mirror c) convex mirror d) spherical mirror

c) convex mirror

Which describes the bending of light as it passes around or through a slit? a) polarization b) Doppler effect c) diffraction d) reflection

c) diffraction

If an object was placed inside the focal point of a convex mirror, the image would be___ a) reduced, real, upright b) enlarged, real, inverted c) enlarged, virtual, upright d) not focused

c) enlarged, virtual, upright

An object that appears green___ a) is made of a green substance b) is absorbing green c) is absorbing all of the wavelengths of light and reflecting green

c) is absorbing all of the wavelengths of light and reflecting green

By mixing red light and blue light one would produce___light a) yellow b) cyan c) magenta d) blue

c) magenta

If you look through two polarizing filters, one filtering the horizontal component and the other the vertical component, of light, you would see____ a) colors b) half the amount of light c) nothing d) the full amount of light

c) nothing

The EM waves with the longest wavelength are__waves a) television b) microwaves c) radio d) x-ray

c) radio

Refraction occurs because a) light rays are low energy and bend easily b) the frequency changes as it light moves from one substance (medium) to another c) the speed changes as light moves from one substance (medium) to another causing light to bend

c) the speed changes as light moves from one substance (medium) to another causing light to bend