Khan Academy

Khan Academy

Year 1

element 02

English

element 02

Writing Skills

Complex Sentence

Complex sentences | Syntax | Khan Academy
English Khan Academy

Pronoun

What is a pronoun? | The parts of speech | Grammar | Khan Academy
English Khan Academy

Form 4

element 02

Physics

element 02

Measurement

Physical Quantities

Significant figures | Decimals | Pre-Algebra | Khan Academy
English Khan Academy

Scientific Investigation

More on significant figures | Decimals | Pre-Algebra | Khan Academy
English Khan Academy

element 02

Light and Optics

Refraction of Light

Refraction in water | Geometric optics | Physics | Khan Academy
English Khan Academy

Refraction of Light

Refraction and Snell's law | Geometric optics | Physics | Khan Academy
English Khan Academy

Total Internal Reflection

Total internal reflection | Geometric optics | Physics | Khan Academy
English Khan Academy

Image Formation by Lens

Concave lenses | Geometric optics | Physics | Khan Academy
English Khan Academy

Image Formation by Lens

Convex lenses | Geometric optics | Physics | Khan Academy
English Khan Academy

Image Formation by Spherical Mirror

Specular and diffuse reflection 2 | Geometric optics | Physics | Khan Academy
English Khan Academy

Image Formation by Spherical Mirror

Specular and diffuse reflection | Geometric optics | Physics | Khan Academy
English Khan Academy