Convex and Concave Lens

If an object's distance from a convex lens were increased, the image would become which of the following?

• Larger and virtual

• Larger, only

• Smaller, only

• Smaller and virtual

Tags

NGSS.MS-PS4-2

If an object is placed at a point 2F infront of a converging lens, Which of the following will describe the image correctly ?

• Real

• Inverted

• Same Size

• Beyond 2F

A thin converging lens is used to produce, on a screen, a focused image of a candle. Various focused images are produced on the screen by moving the lens and the screen backwards and forwards. Which statement is always correct?

• The image is at the principal focus (focal point) of the lens.

• The image is bigger than the object.

• The image is closer to the lens than the object is.

• The image is inverted.

A student draws three rays of light from point P through a converging lens. Each point labelled F is a principal focus of the lens. Which of the rays are drawn correctly?

• ray Y only

• ray Z only

• ray X and ray Y

• ray X and ray Z

The diagram represents a converging lens forming an image of an object. Which of the following lines show the focal length of the lens?

• PQ

• PR

• QR

• QS

How are convex and concave lenses different?

• Convex lenses are thicker in the middle, while concave lenses are thicker at the edges

• Convex lenses are thicker at the edges, while concave lenses are thicker in the middle

• Convex lenses have curved surfaces that are curved outwards, while concave lenses have surfaces that are curved inwards

• Convex lenses have surfaces that are curved inwards, while concave lenses have curved surfaces that are curved outwards

What is the focal point of a convex lens?

• The point where light rays converge after passing through the lens

• The point where light rays diverge after passing through the lens

• The point where light rays reflect off the lens

• The point where light rays pass through the lens without bending

What is a lens?

• A transparent glass or plastic with curved sides that can bend light

• A device used to explode the wonders of the universe

• A tool for measuring refraction

• A type of mirror

What is refraction?

• The bending of light rays as they pass through a lens

• The process of exploding the wonders of the universe

• The redirection of light rays as they pass from one medium to another

• The reflection of light off a mirror

Tags

NGSS.MS-PS4-2

What happens to parallel light rays when they pass through a convex lens?

• They converge at a focal point.

• They diverge away from each other.

• They reflect back in the same direction.

• They pass through without bending.

Tags

NGSS.MS-PS4-2