GCSE level optics questions

Q22. The diagram shows parallel rays of light being refracted by a convex lens.

(a) What is distance ‘X’ called?

[1 mark]

(b) Lenses can be used to form the image of an object.

Complete the ray diagram below to show how a convex lens forms the image of the object.

Use an arrow to represent the image.

[2 marks]

Give one similarity and one difference between the image formed by the convex lens and the image formed by the concave lens.

[2 marks]

(d) A person uses a lens to read the letters on the back of a coin.

The image height of the letters on the coin is 9.0 mm

The magnification produced by the lens is 6.0

Calculate the height of the letters on the coin.

[3 marks]

(Total 8 marks)