Colours And Visibility
Colours And Visibility
Some apples are red, while others are green. This is because pigments on the surface of the apples determine their colour. Under white light, the apple looks red because it reflects red light towards your eyes and absorbs orange, yellow, green, blue, indigo and violet light. In reality, the red apple may reflect a little orange light as well, but this just affects the shade of red that you see. In the same way, a blue shirt reflects blue light (and probably a little green and violet) and absorbs all other colours of light. A white car reflects most of the light and radiant heat that hits it. In comparison, a black car reflects very little light or radiant heat. Most of this radiant heat and light is absorbed. As a result, a black car heats up more rapidly than a white car on a fine day.
Primary colours:-
White light can be produced by shining all colours together. White light can also be made by using just three colours of the spectrum - red, green and blue. For this reason, these are called the primary colours of the spectrum. When you combine light of the primary colours in pairs, the three secondary colours - magenta, cyan and yellow - are produced.
Colour Filters:-
A red apple absorbs all colours of the visible spectrum except red light. Similarly, a red piece of cellophane absorbs all colours except red light, which passes straight through. The cellophane acts as a colour filter. colour filter only allows light of its particular colour to pass through (to be transmitted). the way some combinations of light are transmitted or absorbed by a filter. Coloured filters are used widely in photography and theatre to provide a range of lighting effects.
Colour Printing:-
When all the colours of light are added together, white light is produced. However, if you mixed every colour of paint pigment, then the final mixture would look dark and murky. As more paint pigments are added, more colours are absorbed rather than reflected. This type of Colour combination is called subtractive colour mixing. The three subtractive primary colours are cyan, magenta and yellow. How these three Colours can produce all other colours.
The cellophane acts as a_________________? | |||
| Right Option : B | |||
| View Explanation | |||
A white car reflects most of the light and radiant heat that ___________? | |||
| Right Option : B | |||
| View Explanation | |||
If you mixed every color of paint pigment, then the final mixture would look _____________ | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
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Barkha Arora
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Archit Segal
7thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
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Manish Kumar
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Hiya Gupta
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Eshan Arora
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Ayan Ghosh
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
