[S2] LESSON 46 : Physics Headstart L5 – Lens Updates/Debrief

[S2 Maths + Science PMCians]

What we did in 2 hours:

This week we had our Physics Headstart on Thin Lenses.


In this lesson, we learnt the important terms (optical centreprincipal axisfocal point and focal length) used to describe a thin converging lens and how to construct the ray diagrams for thin converging lenses with rays that behave in a predictable way.

– any light ray passing through the optical centre is not refracted

– any light ray parallel to the principal axis will converge at the focal point.


The position and characteristics (real/virtual, inverted/upright, diminished/magnified) of the image can then be identified.


Lastly, we ended the lesson with a fun 4Q quiz.


Special Mention:

This is our last Headstart lesson for 2020 S2 to 2021 S3. You certainly deserve a break after all the hard work.


Till then, enjoy your school holidays. Stay safe and healthy.


See you again in December! 🙂



Your friendly tutors,

The S2MA+SCI Team


Students can choose to attend any of the timeslots onsite in the respective outlets or live from home at the same timing. There will be both ONSITE and ONLINE audience for all classes. ONSITE and ONLINE students will be able to interact with one another and the tutor will be able to engage both audiences. Both platforms (onsite and online) will be carried out concurrently, ensuring that students in the physical classroom and those attending lessons via Zoom are taught exactly the same content, at the same time, by the same tutor.

Verified by ExactMetrics