Light and Optics

Question 1:Draw ray diagrams which describe the following characteristics of lenses:(a) convex lens as a converging lens(b) concave lens as a diverging lens Answer:(a) (b) Question 2:Figure 1 shows an object placed in front of a convex lens at a distance less than the focal length, ƒ.(a) Draw a ray diagram in Figure 1 to … Read more

Question 1:State the characteristics of the image formed by a magnifying glass. Answer:Image is virtual, upright and magnified Question 2:Telescope X consists of an objective lens with a focal length of 30 cm and an eyepiece with a focal length of 5 cm. What is the separation distance between the objective lens and the eyepiece … Read more

Question 1:Name the type of lens found in the human eye. Answer:Convex lens Question 2:Figure 1 shows two types of lenses. (a) Name the following types of lenses:(i) Lens X (ii) Lens Y (b)(i) Which lens functions as a diverging lens?(b)(ii) Which lens functions as a converging lens? (c) Mark the focal point of lenses … Read more

Question 1:Diagram 1.1 and Diagram 1.2 show an experiment to measure the focal length of two convex lenses.(a) Measure and write down the focal length in Diagram 1.1. [1 mark](b) Observe Diagram 1.1 and 1.2.What is the difference between the focal lengths of the two convex lenses? [1 mark](c) State one inference for this experiment. … Read more