Courses
Teacher-curated, self-paced courses. Looking for a guided sequence through a full topic? See Learning Paths.
3 courses
The Eye, Microscopes and Telescopes New
Physics · High School (11–12) · The Human Eye and Vision, Lenses and Optical Instruments
FreeCh 23 · 3/4
Why do some people need spectacles, and how does a telescope bring the Moon closer? The eye and its defects, the simple and compound microscope, and the refracting and reflecting telescopes, with magnifying power and the limit of what an instrument can resolve. It covers the unit of the Indian syllabus (NCERT, NEET, JEE Main) and the matching topic of A-Level, IB and AP.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Lenses, Prisms and Dispersion New
Physics · High School (11–12) · Lenses and Optical Instruments, Prisms and Dispersion of Light
FreeCh 23 · 2/4
How does a magnifying glass make a small thing big, and why does a prism split white light? The lens maker's formula and the thin lens formula, power and combinations of lenses, and the prism with minimum deviation and dispersion, with the rainbow and the colours of the sky. It covers the unit of the Indian syllabus (NCERT, NEET, JEE Main) and the matching topic of A-Level, IB and AP.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Ray Optics: Lens and Mirror Systems in Depth
Physics · High School (11–12) · Lenses and Optical Instruments
StandardFirst lesson freeExtra course
Beyond the textbook: lenses measured by the displacement method, a lens in a liquid, a lens cut in two or silvered on one face, apparent depth through layers, and the full derivations for the prism. The level of JEE Advanced, A-Level and IB Higher Level, with a full timed paper.
3Lessons12Problems2Python Labs1Question Set1Mock Test
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Lenses and Their Power
Physics · High School (9–10) · Lenses and Optical Instruments
FreeCh 6 · 3/3
A magnifying glass, a camera and the spectacles of a friend all use lenses. Here we learn how convex and concave lenses form images, how to draw and calculate them, and how the power of a lens is measured in dioptres.
4Lessons14Problems2Python Labs1Question Set1Mock Test