Question

Can someone answer all of these please

Answer 1

Answer:

(1) Accommodation of lens

(2) reflection

(3) refraction

(4) Total internal reflection

(1)We cannot able to see the object clearly,when it is kept beyond the near point (H) , which is 25cm away. This is because when we look near objects,our eye lens contract in order to maintain constant image distance,no matter where the object is.

(2)Light is a electromagnetic wave emitted by luminous objects. Without light,we cannot able to know the presence of the luminous and light reflecting objects.

(3) Human eye lens acts as a convex lens.It is made by ciliary muscles.Its main function is accomodation of lens,i.e wherever the object presents,the image will fall on retina at a image distance 2.5cm