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प्रश्न
Why are traffic signals red in colour?
उत्तर
- The wavelength of red colour is more than other colours.
- Red colour will travel long distance without scattering.
- Red colour gets least scattered and reaches people.
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संबंधित प्रश्न
From among the following objects, list out the opaque, translucent, and transparent bodies in the space provided below:
A glass strip, an ordinary paper, greased paper, tracing paper, polythene sheet, wooden piece, steel plate, glycerine, kerosene oil, mustard oil, grounded glass, stone, book, water, and milk.
Opaque Transparent Translucent
Fill in the blank
The brightness of light is measured in ...................
Write true or false
The earth has its own light.
Write true or false
The stars have no light.
Write true or false
Opaque objects do not allow light to pass through them.
________ objects allow all the light to pass through them.
_______ is the natural source that stimulates sight and makes things visible.
Mirrors change the direction of light that fall on them.
State Rayleigh’s law of scattering.
Look at the figure given in Fig. 11.8
Will there be any difference in the shadow formed on the screen in A and B.
