Electromagnetic Radiation

Electromagnetic spectrum is the range of wavellengths of different radiations reflected or emitted by objects with temperature above 0 k. Remote sensing technology make use of such radiations of certain wavelength in EM spectrum to distinguish different objects as different object radiates differently.

Yes, the Particle Model can explain refraction by considering light as a stream of particles (photons) that change speed and direction when passing through different mediums, causing the bending of light rays.

GALEX detects ultraviolet (UV) radiation from celestial objects in space. It is specifically designed to study the UV emission from stars, galaxies, and other astronomical sources.

To calculate the energy of X-ray photons, we use the formula E = hc/λ, where h is Planck's constant (6.626 x 10^-34 J s), c is the speed of light (3 x 10^8 m/s), and λ is the wavelength of the photon in meters.

First, we convert the wavelength from nanometers to meters: 0.135 nm = 0.135 x 10^-9 m.

Now we can plug these values into the formula: E = (6.626 x 10^-34 J s * 3 x 10^8 m/s) / (0.135 x 10^-9 m) = 4.65 x 10^-15 J per photon.

It depends on the experiment, of course, but a discharge tube contains ionized atoms, while an incandescent simply has glowing metal. The former is, for most experiments, a lot more interesting.

In our Universe, EM radiation can only come in discrete chunks called "photons." The energy of each individual photon depends on the frequency of the EM radiation. Frequency depends on wavelength (or vice-versa): the shorter the wavelength, the higher the frequency. Thus, short wavelength photons have more energy. That's just how our Universe operates, whether or not we like it.

A vibrating speaker uses electrical energy to power its internal components, which in turn produce sound energy through the vibration of the speaker cone. The sound energy is then transferred as mechanical energy through the air as sound waves.

As the saying goes, "Do not try this at home!"

UV light, that would be powerful enough to kill germs in water, will also irreversibly destroy the retinae of your eyes -- and do so without any pain or symptoms prior to loss of sight!

Better to just buy a Steri-pen, which has the safety features necessary to protect your eye sight.

A kidney scanner uses gamma radiation because it has higher penetration ability, allowing it to reach and image deep structures inside the body like the kidneys. Beta and alpha radiation have lower penetration abilities and would not be suitable for this purpose. Additionally, gamma radiation is less likely to be absorbed by surrounding tissues, providing clearer images of the kidneys.

1) Photo-electric effect.

2) Spectrum of black-body radiation.

3) Compton scattering spectrum.

4) Disappearence of interference pattern with two slits, if a way is made to determine which slit the light went through.

All three of these can be easily explained by assuming that light is composed of photons, and that the energy of those photons is proportional to the frequency of the light. None of three can be explained by assuming light is purely an electro-magnetic wave.

No, grilling is not a form of radiation. Grilling is a cooking method that uses direct heat from a heat source like charcoal or gas to cook food. Radiation is a form of energy that comes from sources like X-rays or nuclear reactions.

Blue light has more energy.

Using the formula:
photon energy (E) = Planck constant (h) * frequency (ƒ) Blue has a higher frequency than red. Since h is constant, E increases as ƒ increases.


Using the formula:
photon energy (E) = Planck constant (h) * speed of light (c) / wavelength (λ)
Blue has a shorter wavelength than red. Since h and care considered constant, E increases as λ decreases.

Infrared waves show heat loss in buildings. These waves are absorbed by objects, causing them to increase in temperature. By detecting the infrared radiation emitted from surfaces, one can identify areas where heat is escaping from the building.

To calculate the energy of an x-ray photon, you can use the formula E = hf, where E is the energy, h is Planck's constant (6.626 x 10^-34 J s), and f is the frequency of the photon. First, convert the frequency from Hz to s^-1. Then, plug in the values to find the energy in joules, which can be converted to keV by dividing by 1.6 x 10^-16.

It's detected by means of a camera that is sensitive to infra-red light. Visible light forms only a tiny portion of the electromagnetic spectrum.

Infrared light, microwaves and radio waves have wavelengths longer than visible light. Radio waves have the longest wavelength.

1. Ozone protects us from harmful UV rays by absorbing and scattering the radiation before it reaches the Earth's surface.
2. Nitrogen plays a minor role in protecting us from harmful sun rays since it mainly acts as a diluent in the atmosphere, helping to reduce the intensity of solar radiation.
3. Carbon dioxide does not directly protect us from harmful sun rays but it contributes to the greenhouse gas effect, which traps some of the sun's heat on Earth.

Electromagnetic radiation changes its wavelengths when it interacts with matter due to phenomenon such as absorption, reflection, or scattering. These interactions can cause the radiation to lose or gain energy, resulting in a shift in wavelength.

It is very much important for the ozone layer to absorb the ultra violet rays from reaching the Earth as it can cause a lot of damage and destruction to our planet. Moreover, it is very much harmful if it reaches the Earth's surface which can affect the whole living population and cause skin cancer to human beings.

Depends what you mean by "useful."

UV light can cause chemical reactions to occur very rapidly, and is thus used in highly precise photo-engraving, such as in the making of micro-chips.

It is also useful in killing micro-organisms.

Who would be stuiped enough to think if plasma [salyva] will creat a magnetic field. the only person who could find out really if plasma produces a magnetic field is to test it out and experiment!

Visible light has a lower frequency than infrared radiation. Visible light ranges in frequency from approximately 430 THz (red light) to 750 THz (violet light), while infrared radiation has frequencies below 430 THz.

The smallest amount of energy that can be emitted or absorbed as electromagnetic radiation is a photon, which behaves like a particle carrying discrete energy. This minimum amount of energy is determined by the frequency of the radiation, according to Planck's equation E=hf, where E is energy, h is Planck's constant, and f is frequency.

No, a quantum is the smallest discrete unit of energy that can be emitted or absorbed in the form of electromagnetic radiation. It is a fundamental concept in quantum mechanics that explains the behavior of particles at the atomic and subatomic levels.

The higher the frequency, the greater the electromagnetic energy. High-frequency gamma rays are the most energetic form of radiation (and the most dangerous to human health), followed by X-rays, ultraviolet, visible light, infrared (heat), and finally radio waves.

Microwaves are actually a form of radio waves in the near-infrared. What makes them so apparently energetic (and therefore so useful) is that their particular frequency is great at making water molecules vibrate, which imparts heat energy directly into food in a process known as dielectric heating.

E=hv

Where E is energy

h is planks constant

v is the frequency of the EMr