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Page 10 of 13 — articles on the physics of light, sorted newest first.
Concave Lens: Complete Guide, Types, Uses & 5-Min Diagrams
A concave lens is thinner in the middle and thicker at the edges. When light passes through it, the lens spreads the rays outward — it diverges them — so they never meet. This ability to spread light makes it essential in eyeglasses for myopia, door peepholes, flashlights, and laser systems. Here is everything you need to know about concave lenses.
Concave vs Convex Lens: 7 Key Differences & Easy Comparison
A convex lens is thicker in the middle and converges light to a point. A concave lens is thinner in the middle and spreads light apart. Here are 7 key differences between them, how each forms images, and when to use which.
Convex Lens: Easy Guide, Types, Uses & 5-Min Ray Diagram
A convex lens is thicker in the middle than at the edges. It bends incoming light rays inward so they meet at a single point called the focus. This ability to converge light makes it essential in cameras, microscopes, telescopes, and eyeglasses. Here is everything you need to know about convex lenses.
Diagrams of Reflection: Simple 3-Step Guide for Beginners
Drawing a diagram of reflection is easy when you know the law. Here is how to draw a reflection diagram in 3 simple steps, with labelled examples for plane mirrors, curved mirrors, and diffuse reflection.
Reflection of Light Examples: 15 Real-World Cases Guide
Mirrors, lakes, rainbows, and road signs all rely on the same physics — reflection. Here are 15 examples of reflection of light from nature, everyday life, and technology.
Reflection Physics Waves: Laws, Types and Examples Guide
Reflection is the change in direction of a wave when it bounces off a surface. Light, sound, and water all reflect the same way — the angle at which they arrive equals the angle at which they leave.
Reflection, Refraction, and Diffraction: Compare All 3
Reflection, refraction and diffraction are the 3 ways waves change direction when they meet a boundary. Reflection bounces the wave back, refraction bends it through a new medium, and diffraction spreads it around obstacles. Here is how to tell them apart, with a comparison table and everyday examples.
What Happens When Light Hits a Mirror? Easy 5-Step Guide
When light hits a mirror, the photons interact with free electrons in the metal coating. The electrons absorb the incoming photon energy and re-emit it almost instantly, sending the light back at the same angle it arrived. Here is exactly what happens, step by step.
What Is Reflective Light? Simple Guide to 3 Types
Reflective light is light that has bounced off a surface and reached your eyes. Unlike incident light (the light arriving at a surface), reflective light carries information about the surface it hit — its colour, texture, and smoothness. Here is what reflective light is, how it works, and the 3 types you see every day.
When a Wave Bounces Off a Material: Easy Reflection Guide
Reflection is what happens when a wave bounces off a surface it cannot pass through. Light, sound, and water all reflect the same way — the angle of arrival equals the angle of departure.
Does Gravity Bend Light? 5 Simple Ways Spacetime Warps It
Does gravity bend light? Yes — Einstein's general relativity showed that mass curves spacetime, and light follows those curves. The result is gravitational lensing: massive objects act like cosmic magnifying glasses, distorting and magnifying the light from distant galaxies. Here are 5 simple ways gravity warps starlight.
Lens Refraction: 5 Clear Ways Lenses Bend Light
Lens refraction is how a transparent curved shape bends light to form images. A convex lens converges rays to a focal point; a concave lens spreads them out. Here are 5 essential ways lenses use refraction, from eyeglasses to microscopes.