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What material lines the tubes of fluorescent lights and glows when exposed to us light?
The interior of fluorescent light tubes are coated with a phosphor material. When this phosphor material is excited by ultraviolet light produced by the electric current passing through the tube, it emits visible light, creating the glow that we see.
How does a photocell convert light into electrical energy?
A photocell contains semiconductor materials that generate charge carriers when exposed to light. The photons in the light provide energy to these charge carriers, creating an electrical current as they flow through the semiconductor material. This current can then be used as electrical energy.
What is luminous effect of electric current?
The luminous effect of electric current refers to the production of light when an electric current passes through a material that emits light, such as an incandescent light bulb or a phosphorescent material. This process involves the conversion of electrical energy into light energy.
How did Alexandre Edmond Becquerel discover certain materials produced small amounts of electric current when exposed to light?
Alexandre Edmond Becquerel discovered the photovoltaic effect in 1839 when he observed that certain materials, like silver chloride, generated a small electric current when exposed to light. This phenomenon occurs due to the absorption of photons by the material, which creates electron-hole pairs and generates an electric current. This discovery laid the foundation for modern solar cell technology.
What is the effect of intensity on photo electric current?
Increasing the intensity of light incident on a photoelectric material increases the number of photons hitting the material, which in turn increases the rate at which electrons are ejected from the material (photoelectric current). Consequently, higher light intensity leads to a higher photoelectric current.
What is photo conducter?
concept of photo conductivity
What is a material the conducts a current under certain conditions?
A material that conducts a current under certain conditions is called a semiconductor. Semiconductors have electrical conductivity between that of a conductor and an insulator, and their conductivity can be controlled by factors such as temperature, applied voltage, or exposure to light. They are widely used in electronic devices such as transistors and diodes.
Conducts electricity when exposed to lightnso it is used in solar cells and in light meters?
Selenium
What is difference between a diode and a photo diode?
diodediode conducts by applying certain voltagephoto diodephoto diode conducts when it is exposed to sun light
What material lines the tubes of fluorescent lights and glows when exposed to us light?
The interior of fluorescent light tubes are coated with a phosphor material. When this phosphor material is excited by ultraviolet light produced by the electric current passing through the tube, it emits visible light, creating the glow that we see.
What kind of material lines the tubes of fluorescent lights and glows when exposed to UV light?
Phosphor is the material that lines the tubes of fluorescent lights and glows when exposed to UV light. This material emits visible light when excited by ultraviolet radiation.
Compare the energy transfer of the light and the fire?
Light interacts with materials in various ways that impact its transfer. A frying pan on the stove gets hot, even though the handle is not exposed to the flame. Heat conducts through a slab of material across a fixed temperature.
How does a photocell convert light into electrical energy?
A photocell contains semiconductor materials that generate charge carriers when exposed to light. The photons in the light provide energy to these charge carriers, creating an electrical current as they flow through the semiconductor material. This current can then be used as electrical energy.
What is the purpose of the filament inside the light bulb?
The filament is a special metal composition of tungsten that conducts current and heats up and emits light as a result of the current and its internal resistance.
Why choke coil is used in tube light?
To limit the current through the lamp when the gas ionises and conducts.
How can you tell if a light bulb is burned out before you try it in a device?
Use a meter to see if it conducts a current.
What conducts electricity when exposed to light so it is used in solar cells and in light meters?
Semiconductor materials such as silicon conduct electricity when exposed to light and are commonly used in solar cells and light meters. When photons from light hit the semiconductor, they generate free electrons and holes, allowing for the flow of electricity.
