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Do all objects reflect light?
Not quite. Nearly all objects reflect light to some degree, even if only a tiny amount, but a "black hole" absorbs all light shining onto it and reflects none whatsoever.
What allows you to see light?
There are light receptive cells in the backs of our eyes known as cones and rods. To see light the lenses in our eyes contract and expand to focus light onto these cells and from there the information is sent to the brain via optical nerves and processed into light and colour.
Why do red object's look black in blue light?
Red and blue are primary colours therefore they do not contain any other colour. When a blue light is shone onto a red object, all the blue light is absorbed by the red object, and as no red light is being shone for the red object to reflect, no light will be reflected from it and it will appear to be black. It is important to remember that physical colours will only reflect it's light colour equivalent. All other colours are absorbed. So red will reflect red, green will reflect green, and red will absorb green and so on.
What would a red object look like shone onto a blue light?
Red and blue are at opposite ends of the visible light spectrum, red being of low frequency, and blue being of high frequency. Sunlight contains frequencies across the whole frequency range, which appears white. An object that appears white reflects all frequencies. A red object appears red because it reflects red (low frequency) light, and absorbs all other colours. Blue light contains only high frequencies. If you are in a darkened room, lit only by blue light, white objects will appear blue because they are reflecting the blue light, and no other frequency is available. But a red object absorbs high-frequency (blue) light, and since this is the only light in the room, it does not reflect any light. Objects that do not reflect any light appear black. Some objects appear black even in sunlight, because they absorb all frequencies and do not reflect any. So to answer the question, when you have a red object that is lit only by blue light, it will appear black.
Can light be reflected off water?
Yes. Everything you see is the light reflecting off of the object you see. So when you see yourself in water that the light bouncing off your face onto the water and back to your eyes.
Do all objects reflect light?
Not quite. Nearly all objects reflect light to some degree, even if only a tiny amount, but a "black hole" absorbs all light shining onto it and reflects none whatsoever.
How do you make working model on street light?
Most objects do not give off their own light; it has to reflect light to be seen. Shine a laser onto a mirror and hold a piece of paper up in front of the mirror, watch how the rays bounce from the laser to the mirror and off onto the paper.
What happens when you use shiny objects to reflect light onto the screen?
Some of the light is scattered on its journey to the screen. When the light hits the screen, some of it is reflected from the surface. The rest is refracted through the material of the screen. What happens then depends on screen and what is on its other side.
How does the colour of light affect plant growth?
Plants are green because the reflect green light. They do not use green light, they use red light to make food. Some plastic mulches are red to reflect red light onto plants to make them grow more.
When you can not see in the dark?
Ever. Human eyes are not built to see in the dark. We don't have that special layer in the back of our eyes to reflect light onto our retinas, like nocturnal animals do. The only way people can "see" in the dark is by using special equipment like night-vision goggles.
How does your eyes visualize objects?
Light from the object passes into your eye and is focussed by the lens in it onto a screen at the back called the retina. This retina is composed of many light sensitive cells, known as rods and cones, which send signals down nerves to the brain where the signal is registered as an image.
What is the function of the mirror in a microscopes?
You adjust the mirror to get more light onto the specimen.If your microscope has a mirror, it is used to reflect light from an external light source up through the bottom of the stage.
What is the function of the tapetum of the eye?
When I did a dissection of a cow's eye in Biology, we came across this term. The tapetum lucidum, which is not found in the human eye, functions to reflect light onto the retina. It especailly helps with night vision since it can reflect light even at very low intensities. It is shiny, glittering with a bluish colour.A specialized surface reflects the light within the eye and is found in the eyes of animals that live under conditions of low-intensity light. Not found in humans.
How does one produce a photogram?
One can produce a photogram by making a print in a photo lab without using a camera. To do this, one places objects onto a piece of light, sensitive paper in a darkroom. Then, one can use an enlarger to cast light onto the paper to capture the silhouettes of the objects placed.
What allows you to see light?
There are light receptive cells in the backs of our eyes known as cones and rods. To see light the lenses in our eyes contract and expand to focus light onto these cells and from there the information is sent to the brain via optical nerves and processed into light and colour.
Why do cats eyes shine so brightly in the dark when they are luminated by a flashlight?
This isn't the most scientific answer in the world, but that's just the way I am. Cat's eyes glow because there is something in the eyes that makes them reflect light, even just a tiny bit. This also means that this only works when there is a smidge of light, and that nothing will happen if there is complete darkness.
Why do red object's look black in blue light?
Red and blue are primary colours therefore they do not contain any other colour. When a blue light is shone onto a red object, all the blue light is absorbed by the red object, and as no red light is being shone for the red object to reflect, no light will be reflected from it and it will appear to be black. It is important to remember that physical colours will only reflect it's light colour equivalent. All other colours are absorbed. So red will reflect red, green will reflect green, and red will absorb green and so on.
