Refraction Lenses

What does the word "converging" mean?

• to separate
• to come together
• parallel 
• perpendicular

A converging lens is also known as a ____ lens.

• convex
• concave
• double
• refracted

When an object is placed on the focal point in front of a convex lens, the image produced is ___.

• real, reduced, and inverted
• real, enlarged, and inverted
• real, true, and inverted
• There is no image

When an object is placed between the focal point and the convex lens, the image produced is ___.

• real, reduced, and inverted
• real, enlarged, and inverted
• virtual, enlarged, and upright
• virtual, reduced, and upright

What does the word "diverging" mean?

• to spread apart
• to come together
• parallel
• perpendicular

A diverging lens is also known as a ____lens.

• refracted
• diffracted
• convex
• concave

Images produced by a diverging lens are always _____.

• real, reduced, and inverted
• virtual, reduced, and upright
• real, enlarged, and inverted
• virtual, enlarged, and upright

Where can an object be placed in front of a concave lens in order to produce a "no image"?

• On the focal point.
• This is not possible for a concave lens.
• Between the lens and the focal point.
• Beyond the focal point.

In the formulat 1/f= 1/do + 1/di, the variable "f" refers to the _____.

• object distance from the lens
• image distance from the lens
• magnification
• focal point 

In the formula 1/f=1/do +1/di, the variable "do" refers to _____.

• the object distance from the lens
• the image distance from the lens
• the object height
• the image height