Vantablack is a super black coating developed in 2014 by Surrey NanoSystems, a British company. The materials to which this coating is applied absorb 99.965 percent of light. This makes it the blackest known man-made coating.
Power and energy are two main terms used in electrical and electronic systems. Many people think that energy and power are the same concepts. These two terms are related but not the same. Energy is basically the ability to do work. Power is the amount of energy used per unit...
CFM stands for cubic feet per minute. CFM is a volumetric unit of flow. CFM represents the maximum amount of air that a fan can move at maximum speed and without any restrictions. CFM is related to the fan’s motor (rotational speed), blade length, blade pitch and shape.
The unused power caused by the inductive and capacitive effects of transmission lines or electrical loads using alternating current is called reactive power. Reactive power, also known as virtual power or phantom power, is measured by VAR (Volt-ampere reactive).
The majority of rechargeable AA and AAA batteries on the market are Nickel-metal hydride (NiMH) batteries. NiMH batteries can be charged/discharged for up to 500-1,000 cycles. This means they can be used for up to 10 years at an average charging frequency.
In the past, perhaps few would have predicted that LEDs in watch displays would be the lighting technology of the future. But it has happened and LEDs are now being used for general lighting purposes. Could OLEDs or laser diodes replace LED technology? And what about light-emitting plants?
Blue light alone does not have a whitening effect. The purpose of the blue light is to speed up the teeth whitening process. It should be used with a bleaching solution. The combination of chemical and blue light significantly increases the final whiteness level of the teeth.
A solar charge controller is a type of regulator that transfers the energy from solar panels to the batteries and load. The charge controller is used to charge the batteries with the electrical energy obtained from solar energy. The charging voltage is regulated to suit the batteries and the batteries...
An oscillator is an electronic circuit or device that can convert a steady-state signal into an oscillating signal (sine wave signal). Oscillators are used to generate repetitive electronic signals. An oscillator can convert a steady-state DC signal into a periodic AC signal at a desired frequency.
When you heat something, you notice that its temperature rises. This may make you think that heat and temperature are the same thing. Because of this misconception, heat and temperature are often used interchangeably. Although the two concepts are related, they are not the same. It is therefore very important...
Calibration is a documented comparison of a measuring device to a traceable reference device. Calibration refers to the process that enables measuring instruments to produce outputs that provide high levels of accuracy and precision. The main purpose of calibration is to ensure the accuracy of measuring instruments and to minimize...
More and more consumers are meeting with LED lighting every day. LEDs are highly efficient and long-lasting light sources. LED lights must meet certain criteria to operate safely during their specified lifetime. Testing LED lamps and fixtures before they are released enables consumers to purchase high-quality products.
Every living thing needs energy to grow. Humans get their energy from food. Plants, on the other hand, get energy from light in a process called photosynthesis. Light initiates the growth cycle of the plant and supports its healthy development. Blue light is essential for the first stage of plant...
LED lighting devices experience significant energy loss during AC-DC power conversion, electro-optical conversion (electroluminescence), and wavelength conversion. Unlike conventional technologies, in LEDs, all energy losses in the light emitting process are expelled as heat. This presents a major engineering challenge where more than half of the power input is converted...
LDR (photoresistor) and photodiode are two types of light sensors commonly used. When the LDR is exposed to light, its resistance changes. The photodiode, on the other hand, produces current when exposed to light. This is the main difference between LDR and photodiode.