Visible Light And The Solar System

Question 1

What is a virtual image

Answer 1

When. The rays are diverging so the light from the object appears to be coming from a different place. A magnifying glass makes a virtual image

Question 2

What is a real image

Answer 2

When light comes together to form an image on a screen

Question 3

What is the axis of a lens

Answer 3

The point passing through the centre of the lens

Question 4

Describe radio waves in communication

Answer 4

Short waves are used in fm and am broadcasting you have to be in line of sight they reflect of the ionosphere
Long wavelength waves aren’t obstructed by mountains and bend around the earth.
Very short wavelength radio waves can pass through the ionosphere so are used as communication