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The photoelectric effect occurs when electrons are emitted after they absorb light. This helps traffic lights function and shine more brightly.
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∙ 10y ago
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Which of the following modern technologies makes use of the photoelectric effect?
The photo-cell is the most practical example of the photoelectric effect. Light strikes a cathode, which causes an emission of electrons and produces current.
Could you use a highly intense beam of red light to eject electrons from the surface of a metal?
Yes, this is called the photoelectric effect. Discovered my Einstein.
What are photoelectric sensors used for?
Photoelectric sensors use light to detect the presence, absence, or distance of an object. They often use the infrared spectrum of light, though visible light is also used.
Is photoelectric effect possible in vacuum?
Of course. Air has no effect on the process, except possibly to absorb or deflectthe energy you're trying to illuminate the target with, and make the photoelectriceffect less active and less noticeable.As he said. Satellites that are in vacuum use photelectric cells to recharge their batteries.
What type of energy uses photoelectric effect?
Solar
How can you lessen the work function in photoelectric effect?
Use a metal with a lower work function.
Which of the following modern technologies makes use of the photoelectric effect?
The photo-cell is the most practical example of the photoelectric effect. Light strikes a cathode, which causes an emission of electrons and produces current.
What is the use of frequency in photoelectric effect?
It Was an Effect Because,Albert Knew Everythinq Possbibly,And i dont think that anyone would wanna judgee of him o;
What do traffic engineers use signals in combination with signs and markings to?
. . . to control and channelize traffic flow to obtain maximum safety and the greatest volume of traffic.
In all circumstances bycicalist have to obey the same traffic signal as vehicles?
Yes they do ! If they use the same roads as 'regular' traffic - they must obey traffic signals etc.
Examples of traffic controls are?
Traffic control ranges from traffic cones and drums to the flaggers who hold the "Stop/Slow" signs. It can also include the cameras that DOTs use to look at traffic.
How does the sensor control smoke detector?
The smoke detectors use the photoelectric effect or a sensor based on the ionization differences between smoke and air.
The emission of electrons from metal caused by light striking the metal is called?
Photoelectric effect.===================================== This phenomenon was discovered by Albert Einstein, for which he received the Nobel Prize for Physics. The solar cells that we use today is a direct application of the photoelectric effect, as the special metal absorbs Sun's photons and gives off electron (and the flow of electrons generates an electric current).
Could you use a highly intense beam of red light to eject electrons from the surface of a metal?
Yes, this is called the photoelectric effect. Discovered my Einstein.
Why do you use red light in traffic signals?
red was used to signify risk from not obeying - red being the color of BLOOD!!!!
Can photoelectric effect be observed using infrared rays?
Yes, but you have to use just the right metal. One that has an ionization level which matches the frequency of IR radiation your are using.
What are photoelectric sensors used for?
Photoelectric sensors use light to detect the presence, absence, or distance of an object. They often use the infrared spectrum of light, though visible light is also used.
