unit 2: induction, em radiation, optics

For an object farther away from the mirror in region 1 (between infinity and C), the image size is ________ the object size.

When the object is located exactly at C, the image size is _______ the object size.

• smaller

• the same as

For an object closer to the mirror in region 2 (between C and F), the image size is ____ than the object size.

larger

If an object is located in region 2, then answer the following questions about the image which is formed with a convex mirror. Please draw the ray diagram to visualize the problem.

1. The image is located on the ____________ side as the object. What is the image type?

2. The image size is ____________ the object size. What is the image orientation?

1. opposite, virtual

2. smaller, upright

A converging lens produces an enlarged real image when the object is placed just beyond its focal point (Region 2).

T

If an object is placed 3.9 cm from a converging lens with f = 4 cm, then its image will be enlarged and virtual.

T

If an object is placed 8.1 cm from a converging lens with f = 4 cm, then its image will be reduced and virtual.

F

A diverging lens produces an enlarged virtual image when the object is placed far beyond its focal point (Region 1).

F

If an object is placed 4.1 cm from a diverging lens with f = 4 cm, then its image will be reduced and real.

F

If an object is placed 8.1 cm from a diverging lens with f = 4 cm, then its image will be enlarged and real.

F

The focal length f is negative for converging lenses.

F

The magnification m is negative for upright images.

F

Virtual images appear appear on the same side of the lens as the object and have a negative value for the image distance.

T

A converging lens produces an enlarged real image when the object is placed just beyond its focal point (Region 2).

T

If an object is placed 3.9 cm from a converging lens with f = 4 cm, then its image will be enlarged and real.

F

If an object is placed 8.1 cm from a converging lens with f = 4 cm, then its image will be reduced and virtual.

F

A concave mirror produces an enlarged real image when the object is placed just beyond its focal point (Region 2)

T

If an object is placed 3.9 cm from a concave mirror with f = 4 cm, then its image will be enlarged and real.

F

If an object is placed 7.9 cm from a concave mirror with f = 4 cm, then its image will be reduced and real.

F

in a concave mirror, if an object is behind the F, the image is ___ and ___

real + inverted

in a concave mirror, if an object is in front of F, the image is ___ and ___

virtual + upright

in a concave mirror, if an object is at the F point, the image is ___

non-existent

in a concave mirror, if an object is behind C, the image is ___

smaller / reduced

in a concave mirror, if an object is in front of C, the image ___

bigger / enlarged

if an object is behind C + F, the image is ___, ___, and ___

• real

• inverted

• reduced

if an object is in between C + F, the image is ___, ___, and ___

• non-existent

if an object is in front C + F, the image is ___, ___, and ___

• virtual

• upright

• enlarged