Understanding Lenses and Images

What is the primary function of lenses in terms of light manipulation?

• To focus and disperse light using refraction

• To emit light

• To absorb light

• To reflect light

What is another name for a convex lens?

• Diverging lens

• Converging lens

• Flat lens

• Reflective lens

How does a concave lens affect parallel rays of light?

• It absorbs them

• It converges them to a point

• It reflects them

• It disperses them outwards

What is the effect of reversing the direction of light through a lens?

• The light is absorbed

• The lens stops working

• The light focuses on the opposite side

• The light focuses on the same side

What determines the power of a lens?

• The material's weight

• The focal length and curvature

• The size of the lens

• The color of the lens

What is the term for the distance between the principal focus and the center of the lens?

• Curvature radius

• Optical axis

• Lens diameter

• Focal length

What happens to light rays in a real image?

• They are reflected

• They are absorbed

• They converge to form the image

• They diverge

Where is a real image formed in the human eye?

• On the cornea

• On the lens

• On the retina

• In the optic nerve

What is a common example of a virtual image?

• A shadow

• A hologram

• A reflection in a mirror

• A photograph

How can you describe an image that is real, inverted, and smaller than the object?

• Virtual, inverted, and smaller

• Virtual, upright, and larger

• Real, upright, and larger

• Real, inverted, and smaller