ANSWER OF ALL WHY IN OPTICS

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Why sky looks blue from the earth?
 Explanation- blue color has less wavelengths so it is more scattering because of scattering is inversely proportional to wavelength according to raylish law of scattering 

·         Why red color is used in traffic signal?

Explanation- due to more wavelengths it scatters least

·         Why we use convex mirror as rear view mirror?

Explanation- it always form virtual and erect image and cover the large area

·         Why sky looks black from the space?

Explanation- In space there is no air so scattering of light can’t take place

·         why the object looks up in the water?

Explanation- it is due to refraction of light

·         Why diamond is brighter then glass? 

Explanation- it is because the diamond has more refractive index then the glass

·         Why rainbow formed?

Explanation- light is a mixture of seven color when light enter in glass prism then it split into seven color this experiment is given by the Newton when light is passes through the water droplets then it split into seven color and rainbow formed.

·         Why we must not see the sun light by unaided eye?

Explanation- when we see the sunlight by unaided eye then the entire light converge at the retina and destroy it.

·         Why convex lens is used in microscope?

Explanation- it is due to only convex lens can magnify the image

·         Why convex lens is used in hypermetropia?

Explanation- it is due to convex lens converge the light

·         Why concave lens is used in myopic eye?

Explanation- it is due to it diverge the light

·         Why convex is used as magnifying glass?

Explanation - It is due to when object is placed between optical center and focus it form larger image then object

·         Why we use concave mirror in solar cooker?

Explanation – it is due to concave mirror converge the light.

·         Why anything start burning when it is placed in front of convex lens?

Explanation- it is due to convex lens converge the light at focus

·         Why sunrise 2 minutes before and 2minuits late sunset

Explanation – it is due to refraction of light .

 

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