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Electromagnetic Radiation

Electromagnetic (EM) radiation is the energy transmitted through space or a material medium in the form of electromagnetic waves. The frequency range of such waves is tremendous, and is shown by the electromagnetic spectrum. These waves include radio waves, microwaves, infrared waves, visible light waves, ultraviolet (UV) waves, X-rays, and gamma rays.

2,156 Questions

Which is not one of the waves of the electromagnetic spectrum - UV rays or Alpha rays or Visible light or Infrared rays?

Alpha rays are not one of the waves of the electromagnetic spectrum. Alpha rays are actually streams of alpha particles, which are clusters of two protons and two neutrons emitted by certain types of radioactive materials.

Are x-rays energy the same as gamma rays?

X-rays and gamma rays are both forms of electromagnetic radiation, but they differ in their origin. X-rays are produced when high-speed electrons collide with a target, while gamma rays are emitted from the nucleus of an atom during radioactive decay. Both types of radiation have similar properties, such as high energy and ionizing capabilities, but they have different wavelengths and frequencies.

What does radiation poisoning do to people and animals?

Radiation poisoning occurs when individuals are exposed to high levels of ionizing radiation, leading to damage to cells, tissues, and DNA. Symptoms can include nausea, vomiting, hair loss, and in severe cases, organ failure and death. Both humans and animals can experience long-term health effects such as cancer and reproductive issues.

What gases in the atmosphere absorb infrared radiation and Which gases absorb ultraviolet?

Some of the gases found in our atmosphere which absorb infrared light are: carbon dioxide, methane, and water vapor. Gases found in our atmosphere which absorb ultraviolet light are ozone (O3) and oxygen gas (O2).

What is the difference between radiation protection and radiation safety?

Radiation protection focuses on minimizing exposure to radiation to prevent harm to individuals and the environment. Radiation safety, on the other hand, encompasses practices and measures put in place to ensure that radiation sources are properly handled, stored, and used in a safe manner to protect individuals and the public from potential harm.

What things has the highest frequency in the electromagnetic spectrum?

Visible light has the highest frequency in the electromagnetic spectrum. It falls between ultraviolet and infrared light, with a frequency range of approximately 430 to 750 terahertz (THz).

Can sound waves be polarized like electromagnetic waves can?

For polarization the direction of the oscillation has to be perpendicular to the direction of travel. In sound waves, which are longitudinal waves, this isn't the case and thereby can not be polarized.

What is the separation between hot spots in a 2.45 GHz microwave oven?

That's a very interesting question ... one that I've seriously been meaning to measure

for myself for a very long time but of course never quite got around to it.

The wavelength at 2.45 GHz is roughly 3 x 108/2.45 x 109 meters = 121/4 centimeters

(very round numbers).

Based on nothing but the seat of my finely tuned pants, I expect the spacing

of the RF standing waves in the cooking cavity to be related to that number,

and the structure of the hot spots to repeat with a period of either that or else

half of it. So before I set anything up, I would predict the separation to be

something close to either 4.8 inches or 2.4 inches.

Of course, now that you've asked and I've offered a blue-sky answer based on

nothing, I once again intend to measure it soon. I'll describe the method I plan,

but this is NOT recommended by anybody, least of all this website, and you did

NOT get this suggestion from any internet entity. (say that 5 times fast)

-- I'll make a sheet of ice, maybe a couple of inches thick, in a large disposable

aluminum pan in the freezer. With careful advance planning, I'll grease the pan,

and remove it after the freezing, leaving only the ice.

-- I'll take a sturdy, empty cardboard box of some kind, a few inches thick, stiff

enough to hold the weight of the ice, and small enough to fit into the MW. This

will get my test ice up off the bottom, where the standing-wave pattern may be

different from what it is out in the middle of the cavity.

-- I won't have to disable the turntable ('carousel') because ours hasn't worked

in months. But anyone else considering doing this experiment, in a controlled,

laboratory environment, with several OSHA, Fire Dept., and medical observers

present, which I am NOT suggesting that anyone consider doing, would want to

disable the turntable before proceeding.

-- I'll run the RF for maybe 15 - 20 seconds at a time, until I begin to see little

puddles developing on the surface of the ice. They may not all appear at the

same time, so it may take a few more shots to discern the overall pattern.

-- If a pattern does emerge, the spacing can be easily measured, after carefully

sliding the ice sheet out of the oven and immediately wiping up any spillage

before my wife comes in.

That's what I plan to do, but I am NOT recommending it for you.

What electromagnetic spectrum has the second longest wavelengths?

The electromagnetic spectrum that has the second longest wavelengths is the radio waves spectrum. They have frequencies ranging from about 30 kHz to 300 GHz, making them longer than microwaves and shorter than infrared waves.

Is cellphone radiation more harmful than just standing in bright sunshine?

No. Cell phone radiation is radio waves in the Megahertz and Gigahertz frequencies. This does not break up molecules in your body. Cell phone radiation is harmless. Solar radiation is infra red, visible light and ultraviolet light which can burn you and break up molecules on your skin, and also particle radiation which can break up molecules deep in your body.

What types of people use the ultraviolet radiation?

People who benefit from ultraviolet radiation include those with skin conditions like psoriasis who undergo UV therapy, individuals seeking to enhance their mood or treat seasonal affective disorder with light therapy, and those who use UV rays for sterilization purposes, such as in medical settings or for water treatment.

Do x ray and gamma ray telescopes have the same design as an optical instrument?

No, x-rays and gamma rays cannot be focused by lenses or conventional telescope mirrors. To make mirrors that will focus x-rays or gamma rays you need very shallow glancing angle mirrors, that are nearly just parabolically tapered tubes. Typically several of these tubes with the same focal point but different diameter are nested inside each other.

How are visible light ultraviolet light infrared light x-rays gamma rays microwaves and radio waves related?

These are all forms of electromagnetic radiation, which travel in waves at different frequencies and wavelengths. They differ in energy levels and how they interact with matter. Electromagnetic spectrum ranges from radio waves with the lowest energy and longest wavelength to gamma rays with the highest energy and shortest wavelength.

What is the layer of the atmosphere in which the ozone absorbs ultraviolet solar radiation?

The ozone layer is located in the stratosphere, which is the second layer of the Earth's atmosphere. It absorbs and filters out a significant portion of the Sun's harmful ultraviolet (UV) radiation, protecting life on Earth from its harmful effects.

Is it true or false that electromagnetic radiation includes only visible light waves?

Actually, for most people, probably 98%, it is not possible to see UV light itself, you can only see the florescent effect resulting from UV light being reflected back as normal light by objects that have this property. The lens of the human eye filters out the actual UV spectrum in a normal human eye.

HOWEVER, some people have to undergo eye surgery to remove the lens (for various reasons) and once the lens is removed, those individuals (myself included) CAN actually see some of the UV spectrum.

Since I was a kid, I could not understand why "black lights" were called by that name, to me, they appear a very bright white-blue-violet color. They appear that way to me until I put my glasses on, because my glasses have a UV-blocking coating on them. As a result of my being able to see UV, when I am outdoors many colors have a more blueish-purple tint to them.

I am not sure how much of the UV spectrum people with my condition can actually see, but it is certainly very noticeable. So yes, SOME humans can view ultraviolet light.

What gamma ray energies result from uranium 238 decay?

Gamma rays from uranium-238: * 0,013 000 MeV energy and 0,088 313 probability * 0,066 376 MeV energy and 0,000 970 probability

Which is more dangerous living near a cell tower base station or living under one?

Living under a cell tower base station is generally considered more dangerous than living near one. Radiation exposure decreases significantly with distance, so living directly under the tower would expose you to higher levels of electromagnetic radiation. It's always advisable to maintain a safe distance from cell towers to minimize exposure risks.

What do you call the radiation that is always present?

Background radiation is the term used to describe the low levels of ionizing radiation that are constantly present in the environment from both natural and man-made sources.

Is a dosimeter a radiation badge that contains a sensitized film?

A dosimeter based on sensitized film is one kind of radiation dosimeter, but there are other different kinds, and film badges are becoming less common.

One widely known dosimeter is the direct read "pen style" electroscope dosimeter. Another "pen style" dosimeter is a miniature ionization chamber, but like the film badge dosimeter requires special equipment to read it later in a lab.

Probably the most commonly used type of dosimeter outside of emergency response is the TLD, or thermoluminescent dosimeter.

What is the basis for all telecommunications signals?

The basis for all telecommunications signals is the transmission of data through electronic or optical signals. These signals carry information such as voice, video, or text over different mediums like cables, airwaves, or fiber optics. The signals are encoded and decoded using specific protocols to ensure accurate and secure communication.

What is the frequency of an electromagnetic wave with a wavelength of 1.80cm?

This is a typical math question about a wave.

First you need to know the equation: c=fλ where f is frequency, c is the speed of light and λ (Greek letter lamda) is wavelength. Next, you rearrange the equation so it can solve for what you're looking for--in this case, its frequency f. Algebraically, you can obtain the equation f=c/λ

Now you can plug in the speed of light (2.99x108 meters per second) and the wavelength that is 1,000,000 meters or 1x106 meters. And solve. The answer should be 299 Hertz (or inverse seconds-- s-1)

Does ultraviolet light have a lower frequency than visible light?

No, ultraviolet light has a higher frequency than visible light. Visible light has wavelengths between about 400 to 700 nanometers, while ultraviolet light has shorter wavelengths below 400 nanometers.

Which band of the electromagnetic spectrum is used in night sights?

Night sights, such as night vision goggles, typically use the infrared band of the electromagnetic spectrum. Infrared light is emitted by warm objects and can be detected by night vision devices to create nighttime images.