by Rajan Gupta | Aug 25, 2020 | Optical Instruments
Retina contains a large number of light sensitive cells called rod cells and cone cells. The rod cells respond only to the intensity of light, while the cone cells respond to the colours of an object. There are 3 types of cone cells which are sensitive to red, blue...
by Rajan Gupta | Aug 25, 2020 | Optical Instruments
We have already studied that the amount of light entering the eye through pupil is controlled by iris. But this adjustment takes some time. For example, our eyes cannot see everything clearly when we enter a dark room from a bright light. The reason for this is that...
by Rajan Gupta | Aug 25, 2020 | Optical Instruments
The human eye is one of the most important and sensitive sense organ gifted to us by the God. The construction and working of the human eye is like a camera forming an inverted and real image. The diagram showing the structure of human eye are sclerotic, cornea,...
by Rajan Gupta | Aug 25, 2020 | Optical Instruments
The optical instruments are the devices which help us in seeing objects. The most common examples of optical instruments are our eyes, microscope, and telescope. These instruments contain lenses and form images by refraction of light through lenses. In this chapter we...
by abhishek | Aug 25, 2020 | Asexual Reproduction
Fragmentation Fragmentation may be defined as the process of breaking up of parent animal into small parts, each of which can grow into a new complete individual. This process of asexual reproduction is found in planaria and hydra. RegenerationRegeneration may be...
Recent Comments