How do you perceive the colour of an object?

How do we percieve different colours?

How do you define energy ?

Can you tell? How do we perceive different colours?

Select the appropriate option and complete the following paragraph. (cornea, faint, conical, rod, image, coloured, retina, colours, myopic, presbyopic, colour blind) The ____ in our eyes consists of many light sensitive cells. These cells are shaped like a rod and like a cone. The ____ shaped cells give information about the intensity of light to the brain. The ____ cells give information about the colour of the object to the brain. Brain processes all the information received and we see the actual image of the object. Rod shaped cells respond to ___ light also but conical cells do not. Thus we perceive ____ only in bright light. Some people cannot recognize few colours or cannot distinguish between different colours. These persons are said to be _____. Apart from not being able to distinguish between different colours, their eye sight is normal.

Where do you see the pollution around you ?

You have learnt how to calculate the work done on an object when the displacement is in the direction of the applied force. But if the displacement is not in the direction of the applied force, how do we calculate the amount of work done

If natural materials are pollutants, why do we not perceive their adverse effects during their their use ? When such materials are referred as pollutants ?

An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and mango tree?

What problems do you get after playing colours on Rang Panchami?

How do you calculate valency of an element from its electronic configuration?