The video below shows a typical lens experiment. (reference to O-Level SciPhy 2015). I will briefly go through the set-up, main steps and...

Drawing ray diagrams for converging lens come in many forms. But the basic concepts needed are the 3 rays (which have rules to follow) to...

Which of the following light rays behaves correctly when it passes through the converging lens? Solutions: Option C Recall these basic...

A thin convex lens is placed on a plane mirror and an object pin is then moved along the axis of the lens until an image is seen to...

To do similar questions, it is important to know the 3 rays which have rules to follow in order to locate the image. Look through the...

Answer: Option C Focal length f is the distance between the focal point and the centre of the lens (optical centre) . Note that only...

1. Converging lens (convex lens) Converging lens, also known as convex lens,  is thicker at the centre. Below shows some examples. In...

Drawing ray diagrams for converging lens come in many forms. But the basic concepts needed are the 3 rays (which have rules to follow) to...

These 2 questions are actually the same. Q23 is from 2010 Pure Physics P1 while Q11 is from 2014 Sci Physics P1. Take a look at these 2...

Answer: Option A Refer to the diagram (below left) which many are familiar. When parallel rays of light which are parallel to the...

Answer: Option B

Answer: Option C

These two questions are actually the same. Q23 is from 2010 Pure Physics P1 while Q11 is from 2014 Sci Physics P1. Take a look at these 2...