The mirror used by a dentist to check the teeth of a patient is concave. Concave mirrors provide a magnified image, which helps the dentist see a larger and clearer view of the teeth and gums, aiding in better examination ...
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When light transitions from a denser medium to a rarer medium, such as from glass to air, it can internally reflect. This phenomenon occurs due to the change in the refractive index at the interface. Total internal reflection is crucial ...
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 ...
Doppler effect is related to sound. It describes the change in frequency of sound waves due to relative motion between the source and observer. Approaching objects increase the frequency (higher pitch), while receding objects decrease it (lower pitch), affecting how ...
The ozone layer, located in the Earth’s stratosphere, shields life from harmful ultraviolet (UV) radiation. Human-made substances, such as chlorofluorocarbons (CFCs), contribute to ozone depletion, threatening environmental and health impacts.