Lenses

Rays of light from a point object, after refraction through the lens actually meet to form an image.

• real image

• virtual image

• actual image

• erect image

When an object is placed on the focal point in front of a convex lens, the image produced is ___.

• real, reduced, and inverted
• real, enlarged, and inverted
• real, true, and inverted
• There is no image

When an object is placed between the focal point and the optical centre of the convex lens, the image produced is ___.

• real, diminished, and inverted

• real, enlarged, and inverted

• virtual, enlarged, and erect

• virtual, diminished and erect

The point where the rays meet is known as....

• first focal point

• second focal point

• focal plane

• real image

This image is.....

• inverted and smaller

• inverted and larger

• not inverted and smaller

• not inverted and larger

A real image...

• is produced by virtual rays and can be projected on a screen

• is produced by real rays and cannot be projected on a screen

• is produced by virtual images and cannot be projected on a screen

• is produced by real rays and can be projected on a screen

Which describes a convex lens?

• triangular in shape
• more transparent in the middle
• thicker on the edges than in the middle
• thicker in the middle than on the edges

What type of image is formed when rays of light actually intersect?

• real
• virtual
• projected
• curved

Where can you place an object in front of a convex lens but not create an image?

• At 2F

• At F

• Beyond 2F

• Before F

If an object is placed at the F point in front of a convex lens, which of the following will describe the image correctly ?

• formed at infinity

• highly magnified

• real and inverted

• Located beyond 2F

• sharp image will not be created