物理几何光学练习问题.virtual images are called virtual because?a.they are located using virtual light raysb.they are located using parallel light raysc.they are located using normal light raysd.they are located using real light raysA mirror

物理几何光学练习问题.virtual images are called virtual because?a.they are located using virtual light raysb.they are located using parallel light raysc.they are located using normal light raysd.they are located using real light raysA mirror
物理几何光学练习问题.
virtual images are called virtual because?
a.they are located using virtual light rays
b.they are located using parallel light rays
c.they are located using normal light rays
d.they are located using real light rays
A mirror ___ light.
a.reflects
b.none
c.aborbs
d.refracts
which of the following is true for all lenses:
a.all reduced images are inverted
b.all magnified images are inverted
c.all real images are inverted
d.all virtual images are inverted
what would be the angle of reflection if the angle of incidence is 25 degree?
a.65
b.115
c.25
d.-25
when you get a positive value for distance to image,you know the image is __.
a.virtual
b.upright
c.inverted
d.real
when you get a negative value for height of object(hi),the image is ___.
a.upright
b.inverted
c.real
d.virtual
The bottom of the image is always located at___.
a.the principal asix
b.where two light rays meet
c.the focal point
d.inside the labrynth
for a biconvex lens of a focal length of 5 cm ,the image of an object placed 7 cm from the mirror will be
a.virtual,inverted and magnified
b.real,upright and magnified
c.virtual,upright and reduced
d.real,inverted and magnified
An object is placed between f and 2f for a diverging mirrror.the image will be located___.
a.farther than 2f.
b.between f and 2f
c.between the lens and f.
d.there is no image
the radius of curvature is _____
a.inside the lens
b.the focal length
c.twice the focal length
d.half the focal length
all images formed by divergin mirrors are:
a.real,upright and magnified
b.virtual,upright and reduced
c.real,inverted and reduced
d.virtual,inverted and magnified
the focal length of a divergin mirror is 12 cm.an object is placed 5cm away from the lens.the image will be:
a.larger and real
b.smaller and real
c.larger and virtual
d.smaller and virtual
a lens ___light
a.none
b.reflects
c.absorbs
d.refracts
on what side of a converging lens is the principal focus located?
a.on the opposite side of the object
b.on the same side as the object
c.on top of the lens
d.can be on either side

物理几何光学练习问题.virtual images are called virtual because?a.they are located using virtual light raysb.they are located using parallel light raysc.they are located using normal light raysd.they are located using real light raysA mirror
你这是只要翻译啊,还是要答案啊?