When a compact disc (CD) is viewed in sunlight, the colors similar to those of a rainbow are seen due to the phenomena of reflection and diffraction. The CD’s surface consists of closely spaced tracks that act as a diffraction ...
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A lunar eclipse occurs on a full moon day when the Earth passes between the Sun and the Moon. This alignment causes the Earth’s shadow to fall on the Moon, darkening it partially or completely depending on whether it is ...
A coin placed in a vessel filled with water appears slightly raised due to the refraction of light. When light passes from water into air (or vice versa), it changes direction, making the coin appear higher than its actual position ...
The first person to discover the speed of light was Ole Rømer. In 1676, he observed the eclipses of Jupiter’s moons and noticed a discrepancy in their timing, leading him to calculate the finite speed of light.
The velocity of light is maximum in vacuum. In vacuum, light travels at its maximum speed, which is approximately 299,792,458 meters per second (or about 186,282 miles per second).