What Is The Normal Condition For Atoms?
normal conditions for atoms is for them to be in their rest state. when an atom is excited an electron absorbs energy from an outside source and then moves to a higher energy orbital. orbitals are energy states or levels of the atom (they surround the nucleus and can be occupied by electrons).
Why do excited atoms absorb and emit radiation at characteristic frequencies?
Why do excited atoms absorb and reemit radiation at characteristic frequencies? excited atoms absorb and re-emit energy because the electrons absorb the energy and jump up a level or let out energy and go down one. … How do molecules produce spectral lines unrelated to the movement of electrons between energy levels?
In what regions of the electromagnetic spectrum is the atmosphere transparent enough to allow observations from the ground quizlet?
Of all of the types of elcetro magnetic radiation radio waves have the lowest frequency and the longest wavelength. The atmosphere of the Earth is transparent to radio waves with wavelengths of a few millimetres to about twenty metres. As such radio telescopes can be ground based.
Why are gamma rays generally harmful to life forms but radio waves generally harmless?
Gamma rays have enough energy to harm living tissue. In passing through cells gamma rays can break-up important molecules such as DNA and also ionize atoms that causes further cellular damage. Radio waves pass through living tissue without interacting or are reflected which causes no tissue damage to organisms.
What happens as a red hot glowing coal cools?
describe the radiation it emits. … It emits electromagnetic radiation. In terms of its blackbody curve describe what happens as a red hot glowing coal cools. As an object cools then its peak will move to the left ie lower frequency/longer wavelength (Wien’s Law).
What is the deepest geologists have drilled into Earth?
The Kola Superdeep Borehole was just 9 inches in diameter but at 40 230 feet (12 262 meters) reigns as the deepest hole. It took almost 20 years to reach that 7.5-mile depth—only half the distance or less to the mantle. Among the more interesting discoveries: microscopic plankton fossils found at four miles down.
What are the necessary conditions for a continuous spectrum to be produced?
The necessary conditions for a continuous spectrum to be solved is a liquid or dense gas and a luminous liquid. List Kirchhoff’s Laws. 1. A luminous solid or liquid or a sufficiently dense gas emits light of all wavelengths and so produces a continuous spectrum of radiation.
What color has the longest wavelength?
What part of the electromagnetic spectrum can we see with our eyes?
In what part of the electromagnetic spectrum do the biggest?
Gamma rays have the highest energies the shortest wavelengths and the highest frequencies. Radio waves on the other hand have the lowest energies longest wavelengths and lowest frequencies of any type of EM radiation.
What 3 types of waves can be harmful to life?
The most dangerous frequencies of electromagnetic energy are X-rays gamma rays ultraviolet light and microwaves. X-rays gamma rays and UV light can damage living tissues and microwaves can cook them.
What type of waves does the sun emit?
Solar radiation includes visible light ultraviolet light infrared radio waves X-rays and gamma rays.
What is the frequency Hz of red?
| colour* | wavelength (nm) | frequency (1014 Hz) |
|---|---|---|
| red | 650 | 4.62 |
| orange | 600 | 5.00 |
| yellow | 580 | 5.16 |
| green | 550 | 5.45 |
How do astronomers use the Doppler effect?
The Doppler effect occurs for light as well as sound. For instance astronomers routinely determine how fast stars and galaxies are moving away from us by measuring the extent to which their light is “stretched” into the lower frequency red part of the spectrum.
What does Stefan’s law tell us about the radiation emitted by a blackbody?
The experimental Stefan’s law states that the total power of radiation emitted across the entire spectrum of wavelengths at a given temperature is proportional to the fourth power of the Kelvin temperature of the radiating body. Absorption and emission of radiation are studied within the model of a blackbody.
What are the properties of a true theoretical blackbody quizlet?
A blackbody is an object that absorbs all of the enrgy that falls on it. According to the laws of physics it therefore re-radiates thermal radiation with the blackbody spectrum with 100% efficiency. The nature of a blackbody is that it radiates electromag- netic radiation.
Can we dig to the center of the Earth?
It’s the thinnest of three main layers yet humans have never drilled all the way through it. Then the mantle makes up a whopping 84% of the planet’s volume. At the inner core you’d have to drill through solid iron. This would be especially difficult because there’s near-zero gravity at the core.
Why is Earth’s core still so hot?
Is there a planet inside the Earth?
Earth contains buried chunks of an alien world that are ‘millions of times larger than Mount Everest ’ research suggests. Two gigantic blobs of dense rock hundreds of miles tall sit deep inside Earth. New research suggests these blobs are remnants of a planet that hit Earth 4.5 billion years ago.
What causes an emission spectrum?
An emission spectrum is the light emitted when an element in the gaseous state is heated. It is caused when the electrons in excited atoms drop to lower energy states and emit energy as light of specific colours. Each type of element emits its own emission spectrum.
Do atoms emit a continuous spectrum?
What produces an emission line spectrum?
What color has the most energy?
Why is light white?
Objects appear different colours because they absorb some colours (wavelengths) and reflected or transmit other colours. … White objects appear white because they reflect all colours. Black objects absorb all colours so no light is reflected.
What is green wavelength?
The visible green light has a wavelength of about 510 nm.
What colors can’t humans see?
Which color is human eye most sensitive to?
Is light invisible?
Most types of light are invisible to our eyes.
Colors are our brains’ way of interpreting the wavelength of light: how far the light travels before the wave pattern repeats itself. But the colors we see—called “visible” or “optical” light—are only a small sample of the total electromagnetic spectrum.
Which telescope has better resolution?
What is the relationship between frequency and photon energy?
The amount of energy is directly proportional to the photon’s electromagnetic frequency and thus equivalently is inversely proportional to the wavelength. The higher the photon’s frequency the higher its energy. Equivalently the longer the photon’s wavelength the lower its energy.
What is the purpose of interferometry?
What is the purpose of interferometry? It allows two or more small telescopes to achieve the angular resolution of a much larger telescope.
Is Visible light more harmful than microwaves?
Assuming the intensity is the same microwaves are more dangerous than visible light because they penetrate the skin to a greater depth (1-2 cm more info is in Wikipedia). Humans have more adaptation to visible light than to microwave radiation because they were exposed to light for millions of years.
What frequency is harmful to humans?
Scientific evidence suggests that cancer is not only linked to mobile phone radiation and that other factors also may be involved in its development. Most mobile operators use from radiofrequency waves in the range up 300 MHz to 3 GHz that can be harmful for human health (1).
What are microwave frequencies?
Basic Atomic Structure: A Look Inside the Atom
Atomic Size | Atoms and Molecules | Don’t Memorise
Just How Small is an Atom?
Bohr Model of the Hydrogen Atom Electron Transitions Atomic Energy Levels Lyman & Balmer Series