Gamma rays are the most energetic and extremely dangerous form of the electromagnetic waves. What wavelength is dangerous? The most significant adverse health effects have been reported at wavelengths below 315 nm, known collectively as actinic ultraviolet. The effect of UV exposure is not felt immediately; the user may notRead More →
As the Earth shakes at the surface, seismic waves are pulsing through the layers of Earth below, invisible to human eyes and ears but observable as sound waves. Sound waves that can be recorded, even monitored, to provide advance warning of a coming seismic event. How do seismologists study earthquakes?Read More →
X-rays are a form of electromagnetic radiation similar to radio waves, microwaves, visible light and gamma rays. X-ray photons are highly energetic and have enough energy to break up molecules and hence damage living cells. Are rays and waves the same thing? Radio, microwaves, UV, visible light and gamma raysRead More →
All waves transfer energy but they do not transfer matter. What is being transferred by a wave? Waves can transfer energy over distance without moving matter the entire distance. For example, an ocean wave can travel many kilometers without the water itself moving many kilometers. The water moves up andRead More →
Sound can propagate through a medium such as air, water and solids as longitudinal waves and also as a transverse wave in solids. … At a fixed distance from the source, the pressure, velocity, and displacement of the medium vary in time. Why are sound waves shown as transverse? ‘Seeing’Read More →
Mollusks Gastropoda – snails, slugs, and limpets. Bivalvia – clams, oysters, and mussles. Polyplacophora – chitons. Cephalopoda – squid, octopus, and nautilus. Scaphopoda – tusk shaped shells. Monoplacophora. What is the sound of the ocean called? The background sound in the ocean is called ambient noise. The primary sources ofRead More →
When two waves of the same frequency and the same amplitude arrive at one point, they are superimposed, and their amplitudes are added giving rise to an “interference pattern.” … At other points, the two waves vibrate out of phase and the total observed amplitude is smaller than the amplitudeRead More →
Compressional or P-Waves P-waves are the first waves to arrive on a complete record of ground shaking because they travel the fastest (their name derives from this fact – P is an abbreviation for primary, first wave to arrive). They typically travel at speeds between ~1 and ~14 km/sec. WhatRead More →
Light is measured in many units. Its wavelength, λ, is measured in both … ngstroms and nanometers. Its frequency is measured in Hertz. Is light the same as wavelength? Both Wave 1 and Wave 2 have the same wavelength but different amplitudes. The wavelength of light is an important propertyRead More →
According to physicist Freeman Dyson, the sensitivity required to detect such a miniscule distance change caused by a graviton requires the mirrors to be so massive and heavy that they’d collapse and form a black hole. Because of this, some have claimed that measuring a single graviton is hopeless. DoesRead More →