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Page 11 of 13 — articles on the physics of light, sorted newest first.
Explain How Light Bends During Diffraction (6-Step Guide)
Diffraction is the bending and spreading of light waves around obstacles and through openings. Here's how it happens in 6 clear steps, starting from the moment a wavefront meets an edge.
Reflection Refraction and Absorption: 3 Key Interactions
When light hits a material, three things can happen: it bounces back (reflection), it bends as it passes through (refraction), or it gets absorbed and turns into heat. Here is how each one works, with clear examples you see every day.
Reflection vs Refraction: 7 Key Differences (Simple Guide)
Reflection vs refraction — reflection is light bouncing back into the same medium like a ball off a wall. Refraction is light bending as it passes into a different medium and changes speed, like a car turning from tarmac onto sand. Here are the 7 key differences, with a comparison table and real-world examples.
Refraction vs Diffraction: 6 Key Differences, Simple Guide
Refraction bends light when it changes speed between media. Diffraction spreads light when it passes obstacles or slits comparable to its wavelength. Here are 6 clear differences, with everyday examples to help you tell them apart.
Refracted Ray: 4 Simple Steps to Understand (With Diagram)
A refracted ray is the bent path light takes after crossing from one medium into another. Unlike the incident ray (arriving) or reflected ray (bouncing off), the refracted ray passes through the boundary and changes direction. Here's how to identify and draw it in 4 simple steps.
Refraction at Night: 5 Easy Ways Starlight Tricks You
Refraction at night bends starlight as it passes through Earth's restless atmosphere. The same physics that makes stars twinkle also flattens the setting Sun, delays sunrise, and creates mirages. Here are 5 ways the atmosphere plays tricks on your eyes after dark.
Refraction of Light in Water: 5 Clear Examples & Why It Happens
Refraction of light in water is one of the most familiar optical effects you can see. A straw looks bent in a glass, a pool appears shallower than it is, and a rainbow arcs across the sky — all because light changes speed when it hits the water's surface. Here's the physics of why, with clear examples and real numbers.
Refraction Through a Prism: 3 Clear Examples & How It Works
Refraction through a prism is different from refraction through a glass slab: the two surfaces aren't parallel, so light bends at both faces and emerges in a new direction. When that light is white, different colours bend by different amounts and fan out into a spectrum. Here's the physics of how prisms work — from Snell's law to the angle of minimum deviation — with a piece of history from Newton.
Snell's Law: 3 Simple Steps to Find Angle of Refraction
The angle of refraction is the angle between the refracted ray and the normal line where light crosses a boundary. It's calculated using Snell's law: n1 sin θ1 = n2 sin θ2. Here's exactly how to find it, with three worked examples from air, water, and glass.
What Causes Refraction? The Physics of Why Light Bends
What causes refraction? Light bends — refracts — because it changes speed when crossing from one transparent material into another, and it hits the boundary at an angle. Both conditions are needed, and the amount of bending follows a precise rule called Snell's law. Here's the full physics from first principles.
Light vs Matter: Why Light Has No Mass But Carries Energy
Is light matter? No — you can't weigh a sunbeam or hold it in your hand, because light has no mass and isn't made of atoms. Yet it carries real energy and even pushes on things. Here's how light can be so powerful and weigh nothing at all.
What Is Light? A Beginner's Guide to Optics in Physics
What is light, and what is the science that studies it? Light is electromagnetic radiation your eye can detect — and optics is the branch of physics built around it. Here's a beginner's tour of light, the laws it follows, and the field of optics.