phys exam 4 questions & answers
2024/2025
The angle of incidence is measured between the incidence ray and - ANSWERSnormal to the
surface
which is correct about plane mirrors? - ANSWERSPlane mirrors are also known as flat mirrors.
Plane mirrors form same size image as that of the object.
The image formed by the plane mirrors appears to be the same distance behind the mirror as
the object placed in front of the mirror.
The image formed by a plane mirror is always upright and left-right reversed.
what is the magnification of the plane/flat mirror? - ANSWERS+1.0
The rays of light that are parallel to the principal axis meet at the ________________ after
reflecting from the spherical (concave and convex) mirror. - ANSWERSfocal point
What is the relationship between the radius of curvature "R" and focal length "f " of
curved/spherical mirrors (concave or convex)? - ANSWERSR=2f
What is the difference between the real image and virtual image formed by a mirror? -
ANSWERSReal images are formed by the light rays that meet in front of the mirror after
reflection, whereas virtual images are formed when light rays appear to meet behind the mirror.
, Which of the following best describes the image formed by a concave mirror when the object is
located somewhere between the focal point (F) and the center of curvature (C) of the mirror? -
ANSWERSreal, inverted and enlarged (bigger size image)
what type of image is formed by a convex mirror? - ANSWERSvirtual and smaller in size than the
object
When an image forms behind the mirror, which of the following are true? - ANSWERSThe image
distance from the mirror is negative.
The image is called as a "virtual" image.
If a mirror forms enlarged and inverted image that is twice the size of the object, what will be its
magnification? - ANSWERS-2
What can be said about the height of the image if the magnification (M) > 1? - ANSWERSlarger
size image compared with the object
If a mirror forms a virtual and upright image of an object that is four times larger than the
object. If the object is placed 20 cm in front of the lens, what is the magnification of the mirror?
- ANSWERS+4.0
What happens to light beam when it falls on the surface of a transparent material (medium)? -
ANSWERSSome portion of the light is reflected, some is transmitted through the material, and
some could be absorbed.
When a ray of light is refracted as it passes from air to glass, which of the following statement is
true about speed of light? - ANSWERSThe speed of light decreases, and light rays bends toward
the normal.
2024/2025
The angle of incidence is measured between the incidence ray and - ANSWERSnormal to the
surface
which is correct about plane mirrors? - ANSWERSPlane mirrors are also known as flat mirrors.
Plane mirrors form same size image as that of the object.
The image formed by the plane mirrors appears to be the same distance behind the mirror as
the object placed in front of the mirror.
The image formed by a plane mirror is always upright and left-right reversed.
what is the magnification of the plane/flat mirror? - ANSWERS+1.0
The rays of light that are parallel to the principal axis meet at the ________________ after
reflecting from the spherical (concave and convex) mirror. - ANSWERSfocal point
What is the relationship between the radius of curvature "R" and focal length "f " of
curved/spherical mirrors (concave or convex)? - ANSWERSR=2f
What is the difference between the real image and virtual image formed by a mirror? -
ANSWERSReal images are formed by the light rays that meet in front of the mirror after
reflection, whereas virtual images are formed when light rays appear to meet behind the mirror.
, Which of the following best describes the image formed by a concave mirror when the object is
located somewhere between the focal point (F) and the center of curvature (C) of the mirror? -
ANSWERSreal, inverted and enlarged (bigger size image)
what type of image is formed by a convex mirror? - ANSWERSvirtual and smaller in size than the
object
When an image forms behind the mirror, which of the following are true? - ANSWERSThe image
distance from the mirror is negative.
The image is called as a "virtual" image.
If a mirror forms enlarged and inverted image that is twice the size of the object, what will be its
magnification? - ANSWERS-2
What can be said about the height of the image if the magnification (M) > 1? - ANSWERSlarger
size image compared with the object
If a mirror forms a virtual and upright image of an object that is four times larger than the
object. If the object is placed 20 cm in front of the lens, what is the magnification of the mirror?
- ANSWERS+4.0
What happens to light beam when it falls on the surface of a transparent material (medium)? -
ANSWERSSome portion of the light is reflected, some is transmitted through the material, and
some could be absorbed.
When a ray of light is refracted as it passes from air to glass, which of the following statement is
true about speed of light? - ANSWERSThe speed of light decreases, and light rays bends toward
the normal.
