Optics

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

This image is.....

• inverted and smaller
• inverted and larger
• not inverted and smaller
• not inverted and larger

Convex Mirrors produce...

• only virtual images
• virtual or real images
• only real images
• inverted images

You are given three media A, B and C of refractive index 1.33, 1.65 and 1.46. The medium in which the light will travel fastest is

• A

• B

• C

• Equal in all media

In the diagram, which letter represents the angle of incidence?

• A

• B

• C

• D

Why does the lower part of the child appear so much different in size from the upper part?

• The light rays that travel through water and then into air are refracted.
• The light rays that travel through water and then into air are enlarged.
• The light rays that travel through air and then into water are reflected.
• The light rays that travel through air and then into water are reduced.

If the power of a lens is – 2 D, what is its focal length?

• +50 cm

• -100 cm

• -50 cm

• +100 cm

If "black is hotter than white", which of the following has to be true?

• The heat is coming from the light

• The light has to be a certain color

• It has to be hot out

Which terms describe the reflection seen in this image?

• virtual, upright
• virtual, inverted
• real, upright
• real, inverted

Type of mirror that can produce a virtual image...

• Plane

• Convex

• Concave

• All of the above