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What is the importance of light in our daily lives?

Important Questions on The Human Eye and the Colourful World

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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Which colour of the light has the longest wavelength?
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
A carrot looks orange in colour because of the β carotene molecule in it. This means that the β carotene molecule absorbs light of wavelengths,
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
The correct representation of wavelength intensity relationship of an ideal black body radiation at two different temperatures T1 and T2 is
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Write the function of cornea of human eye.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
For a concave lens of focal length f, the relation between object and image distance u and v, respectively, from its pole can best be represented by (u=v is the reference line):
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision

A short sighted person uses a spectacle of power -0.4 D to see very distant objects. How far can he see without using spectacle?

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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
The order of wavelength of visible rays is
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
A student is unable to see clearly the words written on the black board placed at a distance of approximately 3 m from him. Name the defect of vision the boy is suffering from. State the possible causes of this defect and explain the method of correcting it.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Write the function of ciliary muscles of human eye.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision

The following graph depicts the inverse of magnification versus the distance between the object and lens data for a setup. The focal length of the lens used in the setup is

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Distance between the object and the lens m

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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Write the function of crystalline lens of human eye.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Red light differs from blue light as they have :
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
A compound microscope consists of an objective lens of focal length 1 cm and an eye piece of focal length 5 cm with a separation of 10 cm. The distance between an object and the objective lens, at which the strain on the eye is minimum is n40cm. The value of n is.......
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Light follows wave nature because
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Why is the ratio of the velocities of light of wavelengths 4000 Ã… & 8000 Ã… in vacuum 1:1? Which of the above wavelengths has a higher frequency?
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
In visible light wavelength of _____ colour is minimum. 
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
When do we consider a person to be myopic or hypermetropic? List two causes of hypermetropia. Explain using ray diagrams how the defect associated with hypermetropic eye can be corrected.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
Write the function of iris of human eye.
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Science>Physics>The Human Eye and the Colourful World>Human Eyes and Defects of Vision
The change in focal length of an eye-lens is caused by the action of the_____.