Yes and no.
Here is the "no" part of it:
LCDs have three tiny liquid crystals for each pixel of the image. One is used for red, one for green and the other for blue parts of the image. The crystals change character when a voltage is applied and using polarising filters they block or pass light through them. The crystals themselves do not emit light.
And for the "yes" part:
The image that we see is created by lights behind the sheet of liquid crystals. When a crystal passes light, we see it glowing. Obviously, the whole system uses emitted light from the back lighting in order to work but the light source is distinct from the image generation.
The back light has been fluorescent lighting but in 2010 there are now many models using LED illumination. The LEDs are only used to produce the light source and do not take part in the creation of the image details. LED illumination is allowing screens to be come even slimmer than other LCD displays. They are often referred to as LED televisions but the description is not entirely accurate.
There is a new generation of LED television now available. These use LEDs to create the image by emitting red, green and blue light from each LED. Because there is no additional back light source, an LED television does use directly emitted light.
A: Actually electrons hitting the rare earth deposited on the tube causes photons to be emitted and that is what you see
fluorescence
Light energy is a form of energy emitted by a glowing object. When an object becomes hot enough to glow, it releases light energy in the form of visible light.
Light is a form of energy.
It doesn't form an image on the eye but in the brain.
pixels
The smallest visual element on a video monitor is a pixel, which is a tiny square or dot that makes up the screen's image. Multiple pixels combine to form an image or text on the monitor.
A convergent beam of light incident on a plane mirror will form a real and inverted image.
on the retina of ur eye......its an virtual image....
Yes, it does focus light to form an image at the focal point and hence it is used in spectacles.
The cornea and the lens focus the light on the retina - but the "image" you see is formed in the brain from just parts of the light image that exists in the eye.
Most of the Sun's energy is emitted in the form of visible light. This includes wavelengths from ultraviolet to infrared.