Using Convex Lenses to Magnify

Lenses bend light, allowing us to see objects beyond our senses. There are two types: concave and convex. Convex lenses, like those in magnifying glasses, can form virtual and real images. Virtual images are magnified and not inverted, while real images are inverted and can be projected. Convex lenses are used in various optical devices, including projectors.

What is the primary function of lenses in optical devices?

• To emit light

• To reflect light

• To bend light

• To absorb light

Which type of image is formed by a convex lens when the object is closer to the lens than the focal point?

• Real and inverted

• Virtual and magnified

• Real and smaller

• Virtual and smaller

How does a real image differ from a virtual image when formed by a convex lens?

• A real image can be projected on a screen, while a virtual image cannot.

• A real image is smaller, while a virtual image is larger.

• A real image is upright, while a virtual image is inverted.

• A real image is not magnified, while a virtual image is.

What happens to the size of a real image when the object is at a distance more than twice the focal length of a convex lens?

• The image is larger and upright.

• The image is smaller and inverted.

• The image is the same size and upright.

• The image is larger and inverted.

Which of the following devices uses the principle of real image formation by a convex lens?

• Microscope

• Telescope

• Projector

• Camera