Question

how do the following processes occur?
1. when we see an object, a real inverted image is formed on the retina
2. the sound waves, collected by the pinna are changed as vibrations
3.we move our hand away from a hot object
4. a pungent odour makes us close our nose

Answer 1

number 1. when we see an object, a real inverted image is formed on the retina and all above I guess