The Photon is a broad bundle of light rays. When a photon strikes the electrons then it changes the wavelength. The light ray which travels in the form of a bundle is called a beam of light.

An incident ray is a ray of light that strikes a surface. The reflected ray corresponding to a given incident ray, is the ray that represents the light reflected by the surface. The angle between the surface normal and the reflected ray is known as the angle of reflection.

Light | Short/Long Answer Questions A group of light rays given out from a source is called a beam of light.

These refractions cause parallel light rays to spread out, travelling directly away from an imaginary focal point. A biconcave lens curves is thinner at the middle than it is at the edges. Light rays refract outwards (spread apart) as they enter the lens and again as they leave.

While there are numerous names for types of light rays, the most common ones are incident rays, reflected rays, and refracted rays.

Series components have the same current through them but fluctuating voltages. Generally speaking, most LED lighting uses a series-parallel combination. Ideally, for reliability and lighting consistency, it would be best to have one strip of LEDs all wired in series to a constant current driver.

Does a 12v LED need a resistor? ALL LED’s run at higher than their operating forward voltage require a resistor, to act as a current limiting device which will, in turn, limit the voltage drop across the diode.

Connect the positive terminal of the 12 volt power supply to one side of the resistor. Connect the other side of the resistor to the anode of the LED. Check the LED data sheet to identify the anode and cathode. The cathode is commonly the shorter lead and located nearest any flat side of the LED.

The slightest difference in LED or supply voltage may cause the LED to light very dim, very bright, or even destroy. A series resistor will ensure that slight differences in voltage have only a minor effect on the LED’s current, provided that the voltage drop across the resistor is large enough.

Yes you can. But it will not glow that bright because the bulb is rated 120 volts to get the desired brightness.

You have to first convert the 12 volt DC power to 12 volt AC power, and then run the 12 volt AC through a step up transformer. Commercial power inverters and converters supply 120 volt AC power from a 12 volt DC source such as a car battery or solar panel.

Lynk Labs has developed technology that allows LEDs to be driven directly from an AC supply. LEDs are usually considered to be DC devices, operating from a few volts of direct current.

First, What’s The Difference? 120V is known as high voltage, line voltage or standard voltage. 12V, known as low voltage lighting, uses a step-down transformer to change your home’s 120V electrical supply to 12V.

Ordinary, household, 120 volts AC electricity is dangerous and it can kill. We can use a simple formula to calculate the current: Current in Amps = Voltage in Volts divided by Resistance in Ohms. Using electrical tools or equipment in wet areas can be a hazard.

Equivalent Volts and Amps Measurements

Electrical systems based on 12-volt batteries can be used to supply 110-volt AC (alternating current) through the use of a voltage inverter. When coupled with a bank of batteries, voltage inverters are used in battery backups for computers and other electronic equipment.

12v: known as low voltage, this voltage is acheived by “stepping down”, reducing/converting standard 110/120v high voltage into 12v low voltage with the aid of a transformer. 120v: known as high voltage, line voltage, standard voltage or 110v/120v/130v.

When you plug things into the outlet in your house, you don’t get DC. Household outlets are AC – Alternating Current. This current has a frequency of 60 Hz and would look something like this (if you plotted current as a function of time).

Fans can run on both AC as well as DC according to the circuitry used inside it. Fans that we use in our houses run on AC. They have AC motors inside them. They can not be made to run on DC.