Refraction of Light and Lens

The following three questions refer to the following information:

A copy machine uses a converging lens system to create copies of an original image. The converging lens may be moved, thereby altering the effective object length. The focal length of the converging lens of this machine is 10 cm.

 

If the machine makes the copies with the same size as the original, what is the distance between the original and the lens?

a)†† 5 cm

b)†† 10 cm

c)†† 15 cm

d)20 cm

e)†† 40 cm

Refraction of Light and Lens

 

A copy machine uses a converging lens system to create copies of an original image. The converging lens may be moved, thereby altering the effective object length. The focal length of the converging lens of this machine is 10 cm.

 

To produce enlargements that are twice the size of the original, what would be the required distance between the original and the lens?

a)†† 5 cm

b)†† 10 cm

c)†† 15 cm

d)20 cm

e)†† 25 cm

 

Refraction of Light and Lens

A copy machine uses a converging lens system to create copies of an original image. The converging lens may be moved, thereby altering the effective object length. The focal length of the converging lens of this machine is 10 cm.

 

An image of the original is not produced. What objectís distance could account for this occurrence?

a)†† 0.1 cm

b)†† 0.5 cm

c)†† 1 cm

d)5 cm

e)†† 10 cm