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).
Light takes approximately 1.28 seconds to travel from the Moon to the Earth. This distance varies slightly due to the Moon’s elliptical orbit around the Earth, but light’s speed of about 299,792 kilometers per second (or 186,282 miles per second) ...
The speed of light in air is approximately 299,792,458 meters per second (m/s). This speed is slightly slower than in a vacuum due to interactions between light and air molecules, which cause slight delays in its propagation compared to its ...
During a solar eclipse, the part of the Sun that is visible is the corona. This outermost layer of the Sun’s atmosphere becomes visible to observers on Earth when the Moon completely blocks out the bright photosphere, revealing the Sun’s ...
Sound does not pass through vacuum. Sound waves require a medium such as air, water, or solid materials like steel to propagate because they travel through the mechanical vibration of particles in the medium. In vacuum, where there is an ...
Sound waves cannot propagate in vacuum. Sound requires a medium (such as air, water, or solid materials) for transmission because it involves the mechanical vibration of particles in the medium.