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Answered 2011-06-14 11:36:01

There is no gas in the bulb, only vacuum. The blue beam we see is a special flourid mix that sends out the blue stripe when the electron touches the paper and exidates the electrons in it.

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Why phosphor screen is used in night vision goggles?

In a night vision tube, the object of the tube is to convert incoming light particles (photons) to electrons. The electrons are then multiplied many times by the microchannel plate inside the tube. It is these multiplied electrons that are the output 'signal'. However, since your eye cannot see electrons, they are converted back to visible light by way of the phosphor screen which 'lights up' when energized by the electrons.

How does electron allow a fluroscent tube to glow?

The electrons in the mercury arc current in the tube causes the mercury vapor to emit ultraviolet light. The inside surface of the tube is coated with a phosphor that glows with visible light when hit by ultraviolet light.

Why do electrons move the negative end of the tube to the positive end?

Why do electrons move the negative end of the tube to the positive end

How discharge tube is different from tube light?

discharge tube can be used for indentifying electrons while tube light cxannot

Are tube feet visible on the sea cocumber?


How would the electrons produced in a cathode-ray tube filled with neon gas compare with the electrons produced in a cathode-ray tube filled with chlorine gas?

How would the electrons produced in a cathode-ray tube filled with neon gas compare with the electrons produced in a cathode-ray tube filled with chlorine gas?

What is the difference between cathode ray tube and cathode ray oscilloscope?

The cathode-ray oscilloscope is an electronic display device containing a cathode-ray tube (CRT), used to produce visible patterns that are the graphical representations of electrical signals while CRT (cathode ray tube) is a tube that uses high voltage to fire electrons at a screen

Who made the beam of electrons in vacuum tube?

This beam of electrons is emited by the cathode under voltage difference.

How are electrons generated in a gas filled tube?

As this relates to EE, the electrons are already in there.

What is the direction of current in picture tube of TV?

A cathode ray tube (CRT) emits light when electrons strike the front of the glass tube that is covered in a phosphor coating. The front of the tube is the anode of the tube. The electrons are fired from the rear of the tube by an electrode called the cathode. The electrons are formed into a beam or ray, hence the name of cathode ray tube. Although the electrons travel from the rear of the tube to the front, or from the cathode to the anode, conventional current actually flows the opposite direction. So, the current, as measured in amps will flow from the anode to the cathode.

Emitted from a cathode ray tube?


Tube in a flower that makes seeds?

Pollen tube.

The filaments at the back of the cathode tube shoot a beam of electrons to the screen at the front of the tube?

CRT is the answer..

Why do some tube light shine in the night even you off it?

The tube rod has Tungsten as its cathode. When the light is switched on tungsten heats up exciting the electrons of phosporent (fluorescent). Due to excitation and de-excitation of the electrons, light of particular wavelength is released which falls within our visible range. When we cut of the supply, the tungsten doesn't immediately cool off and so does the fluorescent powder on the inner sides of the wall of tube rod. Hence, the tube rd glows for few minutes even after we switch it off.

How did JJ Thomson discover electrons?

A cathode's tube

Which of these was not discovered using the cathode ray tube?


Why are electrons attracted to the cathode in a cathode ray tube?

They are not attracted to the cathode. Electrons are repelled by the cathode.

How does the fluorescent light bulb work?

ionized mercury vapor emits UV light.phosphor coating on inside of tube absorbs UV light and emits visible light.visible leaves tube.

Does a cathode ray tube consists of a stream of protons?

No, a cathode ray tube consists of a stream of electrons.

Why are electrons in a cathode ray tube deflected by magnetic and electric fields?

Because the Electrons have a negative charge

Why CFL bulbs are in tubular in shape instead of being as typical bulbs?

CFL tubes work on the principal of fluorescent effects produced by electrons. Electrons emitted from the cathode in CFL tubes are incident on the chemicals pasted on inner walls of the CFL tube and visible light is produced there as a result of fluorescence. Now, since the electron beams travel only in straight lines, the CFL tube has to be linearly straight for optimum incidence of electrons on the walls of CFL device.

What particle was found using a cathode ray tube?


Can an animal see electrons emitted by a cathode ray tube?


Why electrons move from negative end of the tube to the positive end?

Electrons are negatively charged and so will be repelled by the negative end of the tube and attracted to the positive end.

What is vaccume tube?

A vacuum tube is a current amplifier. It is manufacture with a heater to heat a cathode to emit electrons to a more positive plate or potential. the electrons flow is controlled by a negative potential [the grid] so electrons can be controlled to reach the plate.

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