Here's a good explanation by Veritasium on why the image of the black hole looks the way it does.
Useful Links for Learning about using GeoGebra in SLS. Get a SLS copy of the lesson by filling up the form below. Join the local community of GeoGebra users at: https://www.geogebra.org/group/stream/id/VFX2EG8xa GeoGebra tutorials at: https://www.geogebra.org/m/Ebm5wBW5 (Start with Geometry and Functions & Graphing) GeoGebra apps curated for A-level Physics: https://www.geogebra.org/m/dgedzmz3 GeoGebra apps curated for O-level Physics: https://www.geogebra.org/m/z5nfs8qd IPSG Poster
I created a new GeoGebra app based on an ideal Stirling Cycle (A. Romanelli Alternative thermodynamic cycle for the Stirling machine, American Journal of Physics 85, 926 (2017)) which includes two isothermal and two isochoric processes. The Stirling engine is a very good example to apply the First Law of Thermodynamics to, as the amount of
Teachers in Singapore have been provided with the Student Learning Space (SLS) - an online platform meant for students' self-directed learning using MOE's curriculum-aligned resources as well as for teachers to create engaging technology-assisted learning experiences for their charges. One of the features that many science and math teachers find useful is the ability to create
GeoGebra link: https://www.geogebra.org/m/hscshcj8 This simulation demonstrates the power dissipated in a variable resistor given that the battery has an internal resistance (made variable in this app as well). Since the power dissipated by the resistor is given by and the current is given by I=ER+r , P= E2×R(R+r)2=E2r2/R+R+2r This power will be a maximum if the
Some of the more challenging problems in the topic of electricity in the A-level syllabus are those involving a potentiometer. The solution involves the concept of potential divider and the setup can be used to measure emf or potential difference across a variety of circuits components. Basically, students need to understand the rule - that
I've curated a series of Geogebra apps that are relevant and useful for the instructional objectives under the Singapore-Cambridge GCE 'O' and 'A' level syllabi. Some of these apps were created by myself. If you have any ideas for new Geogebra apps, do let me know in the comments section below and I'll see if
GeoGebra link: https://www.geogebra.org/m/ev62ku7w Students can explore how varying frequency and amplitude of the vertical oscillation of a platform could cause an object resting on it to temporarily leave the platform (i.e. when normal contact force is zero).
GeoGebra link: https://www.geogebra.org/m/xyqhfvyw Applying the 1st Law of Thermodynamics to 4 simple changes on an ideal gas, students can check their understanding using this Geogebra app. When is work done positive? Which processes bring about an increase in internal energy or temperature? Which processes require heat input?