Lens and Optics Quiz

What is another name for a convex lens?

• Negative lens

• Diverging lens

• Converging lens

• Neutral lens

How can you identify a concave lens based on its shape?

• The center is thicker than the edges

• The center is thinner than the edges

• It is flat on both sides

• It has a uniform thickness

What happens to light rays that pass through the optical center of a lens?

• They are reflected

• They are absorbed

• They are refracted

• They pass through without refraction

What is the principal axis of a lens?

• A line that runs along the edge of the lens

• A line parallel to the lens surface

• A line passing through the optical center at a right angle to the lens

• A line that divides the lens into two equal halves

Where do light rays parallel to the principal axis converge in a convex lens?

• At the focal point

• At the principal focus

• At the lens surface

• At the optical center

What is the focal length of a lens?

• The distance between the lens and the image

• The distance between the principal focus and the optical center

• The distance between the lens and the object

• The distance between two principal foci

How many principal foci does a lens have?

• Three

• Four

• Two

• One

What is the formula for calculating the power of a lens?

• P = F

• P = 1/F

• P = F^2

• P = 2F

What unit is used to measure the power of a lens?

• Meter

• Centimeter

• Diopter

• Joule

How does the thickness of a lens affect its power?

• Thicker lenses have higher power

• Thickness does not affect power

• Thicker lenses have lower power

• Thinner lenses have higher power