Concave and Convex Lens

This real image is.....

(hints: ________ and __________)

Is a convex lens thicker or thinner in the middle?

• Thicker 

• Thinner 

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

This image is...

• Inverted and smaller

• inverted and bigger

• not inverted and smaller

• not inverted and bigger

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

what is A on the diagram?

• center of curviture

• focal length

• reflected ray

• focal point

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

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.

Which of the following is true about the focal point of a concave lens?

• It is real and located on the same side as the object.

• It is virtual and located on the opposite side of the object.

• It is real and located on the opposite side of the object.

• It is virtual and located on the same side as the object.

A convex lens is used to focus sunlight onto a piece of paper. What type of image is formed on the paper?

• Virtual and upright

• Real and inverted

• Virtual and inverted

• Real and upright