Sunlight takes approximately 8 minutes and 16.6 seconds to reach the Earth. This duration is based on the average distance between the Earth and the Sun, which is about 149.6 million kilometers (92.96 million miles), and the speed of light ...
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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 ...
Young, first showed that diffraction of light waves occurs. Thomas Young conducted the double-slit experiment in the early 19th century, demonstrating interference patterns that confirmed light’s wave nature. This experiment provided fundamental evidence for the wave theory of light, showing ...
The transverse nature of light waves is confirmed based on the phenomenon of polarization. Polarization demonstrates that light waves oscillate perpendicular to their direction of propagation. This is distinct from longitudinal waves, confirming that light behaves as a transverse electromagnetic ...
The standard sound level for humans is 60 dB. This level represents the threshold of normal conversation and is commonly used as a reference point for measuring other sound levels. Sound levels above 85 dB can cause hearing damage with ...