usually dust of some kind, occasionally water vapor, reflecting the laser light. I am assuming, of course, the part of the beam outside the excitation tube.
No. Unless the LED is specifically a laser, you can not make it focus like a laser by putting it in a housing. A laser produces coherent light, which is why it acts like a beam. A normal LED is not coherent, and you can not make it so. Although you can not make a collimated incoherent light beam able to travel similar distances as a collimated laser beam, you can collimate incoherent light into a beam which would travel some distance with a small amount of divergence.
No it won't. Laser pointer simply emit a laser beam whereas laser tag systems use other methods to register tags. The laser in laser tag is for effect. The actual laser doesn't tag the pack.
Cathode ray.
Dead battery OR very clean air.
Orgasms or "climaxes" are the build up and "explosion" of pleasure. When a spot of pleasure is hit repeatedly (sometimes fast and hard), a build up of pleasure begins. When your body hits the point where it can't take the pleasure anymore, it releases it's build up, hence the orgasm part.
J.J. Thomson discovered that his glowing beam contained negative particles by observing the deflection of the beam in an electric field and measuring the charge-to-mass ratio of the particles. This led to his conclusion that the particles in the beam were negatively charged electrons.
One can see an invisible laser beam by using special equipment like a laser beam detector or by observing the beam's reflection off of particles in the air.
To see a laser beam, you can use special materials like smoke or fog to make the beam visible. The light from the laser reflects off these particles, allowing you to see the beam.
When a laser beam hits a powder, it scatters the light in all directions due to the irregularities and rough surfaces of the powder particles. This scattering effect causes the laser beam to become visible as it interacts with the particles, making it appear as though the beam is "visible."
Optical tweezers use a focused laser beam to trap and manipulate small particles such as cells or nanoparticles. The laser beam generates a gradient force that attracts the particles towards the center of the beam, creating a trap. By moving the laser beam or changing its properties, the particles can be moved, rotated, or studied in a controlled manner.
The cathodic rays beam was deflected by the atomic nucleus.
You can't see a laser beam crossing a room because the laser produces a narrow, focused beam of light that is not scattered easily. The light particles in the laser beam are not interacting with the air particles in the room, so there are no particles for the light to bounce off of and become visible to the human eye.
a small laser, or a laser pointer
No, laser beams do not have an electric charge. Laser beams are composed of photons, which are neutral particles with no charge.
To make a laser beam visible, you can use particles like dust or smoke in the air to scatter the light and create a visible beam. You can also use a fog machine or special laser beam visualization tools to enhance its visibility.
This would not be possible for a couple of reasons. First let us set up the following scenario. We will shoot a laser from the Earth to the Moon which will take 1.2 seconds to arrive. You will be observing from 240,000 miles away in a spaceship that is at a right angle to the laser beam. This will make the Moon the same apparent size as it is on Earth. In theory, you should see a laser beam begin from Earth and quickly get longer and longer until it reaches the Moon in 1.2 seconds. The problem is that when we see a laser beam, we are not actually seeing the beam itself, only a small part of the beam reflecting off particles in the laser beam's path. Since space is a vacuum, there are no particles for the beam to reflect off, so we see nothing unless the laser beam is pointed directly at us, which in this case is not. The other problem is that when the laser light is reflected toward us from the particles, it is also scattered and would be much too faint to observe from that distance, even with a telescope.
In Thompson's experiment, the glowing beam was repelled by a negatively charged plate because the beam consisted of negatively charged particles known as electrons. Like charges repel each other according to the principles of electrostatics, causing the beam to be deflected away from the negatively charged plate.