Eye lens is formed from

O is a small object placed at a distance D from the eye E of an observer. A concave lens of focal length f (/_D) is placed near to the eye and image of the object is viewed. Now the lens is moved towards the object O, away from the eye. (a) Show that the angle subtended by the image at the eye first decreases and then increases as the lens is moved away from the eye. (b) Find the distance of the lens from the object when the apparent size of image is smallest.

The objective lens of a compound microscope produces magnification of 10. In order to get an overall magnification of 100 when image is formed at 25cm from the eye, the focal length of the eye lens should be

The eye lens is

The eye lens is a

Retina, eye lens, brain and skin are formed from

Retina,eye lens brain and skin are formed from

Retina,eye lens brain and skin are formed from

Lens of eyes is derived from