Electromagnetic Radiation

The ultrasonic waves generated with the help of a quartz crystal inside the liquid in a container sets up standing wave pattern consisting of nodes and anti-nodes. The nodes are transparent and anti-nodes are opaque to the incident light. In effect the nodes and anti-nodes are acts like grating(a setup of large number of slits of equal distance) similar to that of rulings in diffraction grating. It is called as acoustic grating or aqua grating. Hence, by using the condition for diffraction, we can find the wavelength of ultrasound and thereby the velocity of sound in the liquid medium.

Frequency of an electromagnetic wave = c / lamba
c = the speed of light = 29979245800 cm/s
lamba (sorry, don't know how to write it on the computer) = wavelength in cm.

Therefore if we assume that your wavelength is 0.07 cm (next time, please remember your units), then your frequency = 29979245800/0.07 = 428274940000 cycles/second (which looks quite off, so I'm assuming that your 0.07 was in meters and not centimeters. In that case convert 0.07m to 7 cm and plug in the formula.)

Violet light: 380-450 nm

Red light: 620-750 nm

nm=nanometer=10-9 meter

Alpha particles are heavy doubly ionized helium nuclei.

Beta particles are nuclear electrons.

Gamma are extremely short photons with zero rest mass.

Hence obviously,

Speed of Gamma>Beta>Alpha.

The radio wave part of the electromagnetic spectrum is typically used for communication because it can travel long distances and pass through obstacles like buildings or clouds. Radio waves have varying frequencies, which are used for different types of communication such as AM/FM radio, television, cell phones, and Wi-Fi.

Carbon-14 dating is normally used by archaeologists rather than geologists because it ceases to be accurate at ages over 50,000-60,000 years. The half life of carbon 14 is about 5,000 years, so it becomes increasingly difficult to detect at time much longer than this.

Geologists use radiometric dating employing other elements that decay more slowly such as uranium/lead and potassium/argon for rocks, particularly very old rocks.

This will work: f=c/lambda : {f = frequency in cycles per second}{c = The Speed of Light = 297,000,000 meters per second}{lambda = wavelength in meters per cycle};

Asking Frequency: Answer = 297,000,000 meters per second / divided by 3.396 * 10 -9 meters per cycle = 297/3,396 cycles per second - or hertz -.

Visible light is a specific portion of the electromagnetic spectrum that humans can see with their eyes. Electromagnetic radiation, on the other hand, refers to all forms of energy that travel as waves at the speed of light, including visible light as well as other forms like radio waves, microwaves, and X-rays.

Very similar, electromagnetic radiation is the term for all sorts of waves and how they move and their properties. Electromagnetic energy is the amount of energy contained in a given wave. The equation energy=wavelength*frequency gives the answer. Basically how big and how many waves their are determine how energetic the wave is.

gamma rays

x-rays

ultraviolet

visible ( v i b g y o r)

infrared

microwave

radio

False. A prism separates the colors of sunlight into a spectrum because each wavelength of light has its own index of refraction, not because wavelengths are affected more or less by the prism.

The metal mesh on the glass panel of a microwave is a safety feature that prevents the microwaves from escaping while allowing you to see inside. The mesh acts as a barrier that reflects the microwaves back into the oven, ensuring that they do not leak out and potentially harm you.

Microwaves and infrared radiation are the two types of electromagnetic radiation commonly used for cooking. Microwaves are used in microwave ovens to cook food quickly and efficiently, while infrared radiation is used in grills and broilers to provide intense heat for cooking.

The Earth emits more infrared radiation than the Sun. The Sun emits mostly visible light and ultraviolet radiation, while the Earth's surface absorbs this energy and reradiates it as infrared radiation due to its lower temperature.

Yes, microwave photons have higher energy than infrared photons. Microwave photons have wavelengths ranging from 1 mm to 1 m and correspond to energies around 1 microelectronvolt, while infrared photons have longer wavelengths and lower energies.

Yes, red photons can be changed to violet photons through a process called frequency upconversion. This usually involves nonlinear optical processes like second-harmonic generation or sum-frequency generation. By combining multiple red photons, it is possible to create a single violet photon with a higher frequency.

A range of wavelengths of light that increases from one end to the other

If you are referring to beta thickness gauging, an isotope emitting beta radiation is used. Sources commonly used include Promethium-147, Strontium-90 and Krypton-85. The source is usually enclosed in a protective cover, but I would keep my distance from it if I were you.

The color of barium in flame is pale green.

Materials such as lead, concrete, and thick metal sheets are commonly used to block electromagnetic radiation. Additionally, materials containing high amounts of copper, like copper mesh or copper foil, can also effectively block electromagnetic radiation. It is important to use materials that are thick and dense enough to provide sufficient shielding against the specific frequency of electromagnetic radiation you are trying to block.

Electromagnetic radiation ranges from radio waves, with extremely long waves, to visible light, with rather small waves, to gamma, with extremely small waves.

As the wave length gets smaller, the energy level gets higher, and therefore more harmful, EM radiation is everywhere and the longer waves are totally safe.

Radiowaves are also all over the place, and if you want to prove this, just turn your radio on and it will interpret the radio waves that are there anyway into sound. These waves are from a few metres to some kilometres long.

Microwaves however cause things to heat up (by resonating the water, i think). so its a good idea not to get massive doses of these, however the only sources of microwaves that can actually expose you to them are mobile phones, which give off tiny doses, nothing to worry about.

Infrared is also safe, it is the range of light used for most TV remotes to send signals.

Obviously, when ever you can see something, you are exposed to visible light, which is a band of electromagnetic radiation, and this is not a problem.

Now, the next band smaller is UV, which is responsible for tanning, sunburn and, in worse cases, skin cancer. UV is safe in small doses, but if your going to expose yourself for long periods of time (sun bathing, tanning beds etc) you should wear sun tan lotion.

X-rays. These are also safe in small doses, and are used in medical imaging, because they travel through skin and soft tissue very well, but get stopped by bone. The doctor (or dentist) only leaves the room when they give you an X - ray because this is something they have to do very often and they would get dangerously high doses if they stood in the room every time.

X ray imaging gives you the lowest dose it can. Higher doses of X-rays can cause cancer and damage cells. This is why you should avoid X-rays if you are pregnant.

Gamma rays are dangerous, they are sometimes used in medical imagine (look up "gamma camera") but only when necessary. Gamma radiation is also used for sterilisation of equipment. Gamma radiation can damage or kill cells. High doses of it on healthy can cause cancer. However, because it can kill cells, it is used to kill cancer cells in a treatment called radiotherapy.

Gamma radiation is the radiation associated with nuclear power, and is probably what most people mean when they talk about "radiation".

The waves of Gamma radiation are on the same scale as the nucleus of an atom.

They travel at the speed of light (c = 3*108 m/s)