Correction of Near-sightedness & Far-sightedness
Focusing To see things detaily, the light from one point of the object must be gathered exactly at one point on the retina. On the other hand, if the light from one…
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Refraction Simulation
Light Refraction
You can drag the path of light. Refraction is the bending of a wave caused by a change in its speed as it moves from one medium to another. This occurs because…
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Rainbow by Raindrops
A rainbow is a natural phenomenon where the dispersion of light is most visible. As you know, a rainbow can be seen after it rains because the water droplets bend and disperse…
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Seeing the Light
Even if the object does not shine by itself, why can we see it? Eye is the organ that feels light. Even if the object does not shine by itself, why can…
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Rainbow Formation
A rainbow is a natural phenomenon where the dispersion of light is most visible. As you know, a rainbow can be seen after it rains because the water droplets bend and disperse…
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Refraction on water
Refraction is the bending of a wave caused by a change in its speed as it moves from one medium to another. This occurs because of the slow speed of light in…
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Convex Lens & Concave Lens
Real image and virtual image Looking at an object, we feel there is an object in it. By the way, if you feel that there is something, we say there is an…
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Principle of least time (Fermat’s principle)
Why does a slightly curved path take less time than a straight path? Ants can move faster on flat stones than on rugged grass. Therefore, travel time is the shortest on slightly…
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