Finding the resistance of unknown resistor R

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...

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...

The video include 3 different light experiments which involve glass block and pins. Most students faced difficulties in locating the pins...

Depending on the experiment, the recording of measured time may be to the nearest 0.1 s or the nearest 1 s, even though a typical digital...