Draw a ray from the object to the lens that is parallel ... magnifying glass can see the image. The image cannot be projected onto a screen because it is a virtual image.

Draw a ray which passes from the object through the centre of the lens. Some ray diagrams may also show a third ray. Peep holes contain concave lenses. They are set into doors so the occupant can ...

Read more: Refraction of Light Question 1: Define the principal focus of a concave ... image of the object is formed. The image will be formed because the uncovered half of the lens is still ...