SciShow
Microscope: The Tube That Changed the World
Humans have long known that glass bends light. However, it took us awhile to figure out that stacking lenses in a tube would open up a whole new world to science, finally allowing us a peek at the microscopic.
MinutePhysics
The "Mountain Or Valley?" Illusion
This video is about a multistable perceptual illusion, similar to the hollow face illusion, whereby maps or aerial or satellite photos look upside down/inside out, ie, concave (valley) parts look convex and convex (mountainous) parts...
SciShow
Why Am I Upside-Down When I Look in a Spoon?
We'd like to know why you're staring at yourself in a spoon in the first place. But we can at least answer the question of why you look upside-down when you do.
Curated Video
Concave
Curving inwards, like the inside of a bowl. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce abstract concepts and...
Curated Video
GCSE Physics - How Lenses Work #69
This video covers - The difference between convex and concave lenses - What 'principal focus' and 'focal length' are - The difference between real and virtual images Exam board specific info: AQA - Separate science only IGCSE Edexcel -...
Curated Video
GCSE Physics - How to Draw Ray Diagrams #70
This video covers: - How to draw ray diagrams for convex and concave lenses - How to comment on whether an image is real or virtual, upright or inverted, and bigger or smaller than the object. Exam board specific info: AQA -...
Visual Learning Systems
Using Light: Summing Up
This video examines the various uses of light and the role of different types of lenses in light refraction. The way in which eyeglasses, contact lenses, and binoculars manipulate light to allow us to see better is illustrated. Other...
Brian McLogan
How to sketch the slope field
Learn how to create slope fields and sketch the particular solution to a differential equation. Slope fields are tools used to graphically obtain the solutions to a differential equation. It is the estimation of the graphical...
Brian McLogan
Learn how to determine concavity of a polynomial function
👉 Learn how to determine the concavity of a function. A function is said to be concave up (convex) if the graph of the curve is facing upwards and the function is said to be concave down (concave) if the graph is facing down. To test for...
Brian McLogan
Learn how to determine concavity and point of inflection AP style
👉 Learn how to determine the concavity of a function. A function is said to be concave up (convex) if the graph of the curve is facing upwards and the function is said to be concave down (concave) if the graph is facing down. To test for...
Brian McLogan
From a table determine the concavity of a function
👉 Learn how to determine the concavity of a function. A function is said to be concave up (convex) if the graph of the curve is facing upwards and the function is said to be concave down (concave) if the graph is facing down. To test for...
Brian McLogan
How to determine the sum of interior angles for any polygon
👉 Learn about the interior and the exterior angles of a polygon. A polygon is a plane shape bounded by a finite chain of straight lines. The interior angle of a polygon is the angle between two sides of the polygon. The sum of the...
Brian McLogan
Find the intervals of concavity from the derivative graph
👉 Learn how to determine the extrema, the intervals of increasing/decreasing, and the concavity of a function from its graph. The extrema of a function are the points where the graph changes from increasing to decreasing or vice versa. A...
Brian McLogan
Find the intervals of concavity from the second derivative graph
👉 Learn how to determine the extrema, the intervals of increasing/decreasing, and the concavity of a function from its graph. The extrema of a function are the points where the graph changes from increasing to decreasing or vice versa. A...
Brian McLogan
How to determine if a function is increasing and at increasing rate using a table
👉 Learn how to determine whether a function is increasing or decreasing from the function's table of values. Given a table of value of a function, we determine whether the function is increasing or decreasing by obtaining the difference...
Catalyst University
Convex-Concave Rules for Mobilizing the SC Joint
In this video, we explore the reasoning behind sternoclavicular joint (clavicle) mobilizations using convex-concave rules.
Brian McLogan
Determine the intervals the graph is decreasing and concave down
👉 Learn how to determine the extrema, the intervals of increasing/decreasing, and the concavity of a function from its graph. The extrema of a function are the points where the graph changes from increasing to decreasing or vice versa. A...
Catalyst University
Thumb CMC Joint Mobilizations [with Convex-Concave Rules]
In this video, we discuss how the thumb's CMC joint is mobilized using convex-concave rules.
Brian McLogan
Learn to classify a polygon regular or irregular ex 3
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which...
Catalyst University
Interphalangeal Joint Mobilizations [with Convex-Concave Rules]
In this video, we discuss how to mobilize any digital interphalangeal joint using convex-concave rules.
Brian McLogan
Classify a polygon as concave, convex, regular or irregular ex 1
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which...
KnowMo
Introduction to Polygons: Classification and Naming of Shapes
The video is a beginner's guide to polygons. It defines what a polygon is and how it is classified into regular and irregular polygons, convex and concave polygons, based on their side lengths and angles. It also covers the names of...
Brian McLogan
Classify a polygon as concave, convex, regular or irregular ex 1
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which...