Physics Light Multiple Choice

Plane mirrors produce images which

Are always the same size as the actual object

The images formed by concave lenses

Are always virtual

A convex lens has focal length f. An object is placed at 2f on the axis. The image formed is located

At 2f

A convex lens has a focal length f. An object is placed between f and 2f on the axis. The image formed is located

At a distance greater than 2f from the lense

A convex lens has a focal length f. An object is placed at f on the axis. The image formed is located

At infinity

An object is placed at a concave mirror's center of curvature. The image produced by the mirror is located

At the center of curvature

Light arriving at a concave mirror on a path through the center of curvature is reflected

Back on itself

Lenses that are thicker at the center

Bend light rays to pony beyond the lense

A convex lens has a focal length f. An object is placed between infinity and 2f from the lens on its axis. The image formed is located

Between f and 2f

A spherical mirror on which reflection takes place on the inner surface of the sphere is referred to as a

Concave mirror

Lenses that are thickest at the center called

Converging lenses

A spherical mirror on which reflection takes place on the outer surface of the spherical shape is referred to as a

Convex mirror

Lenses that are thinner at the center than the edges are called

Diverging lense

The image of the rare stamp you see through a magnifying glass is

Either the same orientation or upside down, depending on the thickness of glass used

An object is positioned between a concave mirror's center of curvature and its focal point. The image produced by the mirror is located

Out past the center of curvature

A light ray, traveling parallel to a concave mirror's axis, strikes the mirror's surface near its midpoint. After reflection, this ray

Passes through the mirrors focal point

Reflection, refraction, and the formation of images by mirrors and lenses has been successful described by the

Ray model of light

An image formed when the light rays pass through the image location, and could appear on paper or film placed at the that location is referred to as a

Real image

If the image distance is positive, the image formed is a

Real image

The principle on which mirrors work is

Reflection

A negative magnification for a mirror means

The image is inverted, and the mirror is concave

Light arriving at a concave mirror on a path parallel to the axis is reflected

Through the focal point

A light ray, traveling obliquely to a concave mirror's surface, crosses the axis at the mirror's focal point before striking the mirror's surface. After reflection, this ray

Travels parallel to the Mirrors axis

If the magnification is a positive value, the image is

Upright

A object is placed between a convex lens and its focal point. The image formed is

Virtual and erect

An object is situated between a concave mirror's surface and its focal point. The image formed in this case is

Virtual and erect

A plane mirror forms an image that is

Virtual and upright

An image formed when the light rays do not actually pass through the image location, and would not appear on paper or film placed at that location is referred to as a

Virtual image

Is it possible to see a virtual image?

Yes, since almost everything we see is virtual because most things do not themselves give off light, but only reflect light coming from some other force

Sometimes when you look into a curved mirror you see a magnified image (a great big you) and sometimes you see a diminished image (a little you). If you look at the bottom (convex) side of a shiny spoon, what will you see?

You will see a little you, right side up

If you stand in front of a convex mirror, at the same distance from it as its focal length,

You will see your image and you will appear smaller

If you stand in front of a concave mirror, exactly at its focal point,

You won't see your image because there is none

If you stand in front of a convex mirror, at the same distance from it as its radius of curvature,

You won't see your image because there is none

If the radius of curvature of the concave mirror is r, the focal length is

r/2

A spherical concave mirror has a radius of curvature of 20 cm. How far from the mirror is the focal point located?

10 cm

A concave mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?

15 cm