Standard Time is a uniform time established by law or custom for a region, often based on the mean solar time of a central meridian. It ensures synchronization of activities, especially for transportation and communication. Time zones divide the world ...
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A peninsula is a landform surrounded by water on three sides and connected to a mainland on one side. It is often characterized by its extended, narrow shape, jutting out into a body of water, such as an ocean, sea, ...
Supersonic aircraft produce a shock wave called a “sound boom”. This occurs when the aircraft travels faster than the speed of sound, creating a sudden increase in pressure and temperature. The resulting shock wave is perceived on the ground as ...
The instrument used to identify and draw sound waves is called a “sonar”. Sonar stands for Sound Navigation and Ranging. It emits sound waves into water and detects the echoes bounced back from objects, helping in navigation, communication, and underwater ...
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.
Sonography is a biological method that uses ultrasonic sound. It involves the use of high-frequency sound waves to create images of the inside of the body. These sound waves, beyond the range of human hearing, are transmitted into the body ...
The photoelectric effect was proposed by Einstein. Albert Einstein, in 1905, explained the phenomenon where photons of light eject electrons from a material’s surface. This theory helped establish the concept of quantized energy of light and the particle-like nature of ...
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 electromagnetic nature of light was discovered by Maxwell. James Clerk Maxwell, a Scottish physicist, formulated the theory of electromagnetism in the 19th century. He unified electricity and magnetism into a single set of equations known as Maxwell’s equations, predicting ...