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Light is the visible form of electromagnetic radiation. All the forms of electromagnetic radiation travel at the speed of light, when they are traveling through a vacuum. A vacuum is a space which contains no particles. The space between the sun and the earth is mostly empty space. When light makes contact with a particle, the light interacts with the atoms of the particle. In chemistry, we learn how electrons interact with light. Visible light is composed of many colors. Each color has a specific frequency.
Energy = Plank's constant * frequency
This means each color of light has a specific amount of energy.
Before the electrons absorbed the energy, the electrons are in their "ground" state. This is their most stable state. When electrons absorb a specific amount of energy, we say that the electrons are in their "excited" state. This is an unstable state. To become stable energy is released, and we see a specific light of a specific color. When you see a blue shirt, you are seeing the result of electrons releasing a specific amount of electromagnetic energy, in the form of blue light.
What happened to the other colors in the visible light?
The atoms absorb the rest of the energy. This causes the atoms to vibrate at a higher frequency. Now the atoms have more kinetic energy. Temperature measures the average kinetic energy of the atoms. So the temperature of the shirt is increasing. When sun light shines on a blue shirt, the temperature of the shirt increases.
You may be wondering what all this has to do with your question!
The energy of electron is called orbital energy. The energy of the vibrating atom is called kinetic energy. The light's energy was converted into orbital energy and kinetic energy. During this time, the light does not exist. When the blue light is emitted from the atoms, light does exist. During this process, the form of a specific amount of the energy is changing from white light to orbital energy to blue light. The rest of the energy is in the form of vibrational kinetic energy of the atoms. This form of energy is actually what we call heat energy.
Average velocity = distance ÷ time
Since the light did not exist for a specific amount of time, but the clock kept on ticking, the average velocity of the light is less than the speed of light in a vacuum.
Light does not need particles to travel. But the particles need the energy of the light to be seen by us and to experience some heat energy.
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What is the difference between light energy and electrical energy?
Lots of differences. For example: light is a flow of electrically neutral particles (called photons), that move at the speed of light (at least, in a vacuum). Electricity is a flow of charged particles - often electrons - that move at speeds below the speed of light.
Why do cold air particles move fast?
The statement is not correct; cold air particles move slowly because they lack the kinetic energy they need to move fast, which is heat.
What effect does the light source have on a radiometer?
The heat from the sun makes the particles vibrate and move and then it make the thing spin. In the shade it doesn't move because the particles aren't moving.
How does light energy move from one place to another?
It moves as particles(photons) AND as waves.
Why do the particles move faster in a vacuum?
Particles do not move faster in a vacuum. Particles move faster when the temperature increases.
Why is there a need for microorganisms to move?
Because they need to eat too, be it food particles, nutrients or other organisms. Even if they only photosynthesize, they have to move towards the light!
Are the particles move the faster in the light bulb or in a campfire?
Yes, light bulbs have the fastest moving particles.
What is the different between light energy and energy?
Lots of differences. For example: light is a flow of electrically neutral particles (called photons), that move at the speed of light (at least, in a vacuum). Electricity is a flow of charged particles - often electrons - that move at speeds below the speed of light.
What is the difference between light energy and electrical energy?
Lots of differences. For example: light is a flow of electrically neutral particles (called photons), that move at the speed of light (at least, in a vacuum). Electricity is a flow of charged particles - often electrons - that move at speeds below the speed of light.
How fast does an object need to move to break the speed of sound?
Light travels at 186,000 miles per second, which means you have to travel faster than that to break the light barrier. This feat is technically "impossible", since the faster you move, the more mass you have and the more mass you have, the more energy is required to move you, and by the time you reach the speed of light, you will need to have infinite energy. This doesn't apply to light particles, since they have no mass.
Why do cold air particles move fast?
The statement is not correct; cold air particles move slowly because they lack the kinetic energy they need to move fast, which is heat.
What effect does the light source have on a radiometer?
The heat from the sun makes the particles vibrate and move and then it make the thing spin. In the shade it doesn't move because the particles aren't moving.
How does light energy move from one place to another?
It moves as particles(photons) AND as waves.
Which is faster the electric particle quantum or the speed of light?
The speed of light is the fastest any real particle can go (only massless particles like the photon can move at the speed of light, particles with nonzero mass must always move slower).However quantum mechanics allows virtual particles to move at any speed (even speeds much faster than the speed of light) but only if any such movement is undetectable (which is why they are called virtual).
Do sound travel faster in water or in air or solids?
Sound can't move in vaccum and need particles to move, it travels fastest in solids as it has highest amount of particles.
Why does solid expand on heating?
The particles in a solid, move very little. But when it is heated, the particles expand because the heat moves the particles around more, making them need more space to move, therefore expanding the solid. =)
Why does a solid expands on heating?
The particles in a solid, move very little. But when it is heated, the particles expand because the heat moves the particles around more, making them need more space to move, therefore expanding the solid. =)
