What do you mean by defect of vision in a person ?
Give the working mechanism of a human eye. How can we see an object?
What do you understand by crystalline lens ?Explain its advantages.
Name the liquid present in the human eye . Write a note on it.
Write the parts and function of human eye in detail .
Write the uses of hand lens, what is it most used for?
A piece of paper can be burnt using hand lens , how ?
What do you mean by optical instrument? Give the types of optical instruments with examples.
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