Explain how the ciliary muscle refines the lens when viewing distant objects and mearby objects.

Which of the following is correct for lens focusing, while seeing distant object ?

The defective condition of accomodation of the eye in which distant objects are seen distinctly but near objects are indistinct is

How does the resolving power of a microscope depend on (i) the wavelength of the light used and (ii) the medium used between the object and the objective lens?

The far point of a myopic (short-sighted ) person is 80 cm in front of the eye. What is the power of the lens required to enable him to see very distant objects clearly.

The muscles of a normal eye are least strained when the eye is focussed on an object

Show with a line diagram how the change in accomodation in your eye happen for seeing short distance object and long distance object.

Write "Yes" or "No" For distant object accommodation, Ciliary muscles relaxes as a result the lens becomes thin and Focal length of the lens increased.

A person is wearing spectacles with concave lenses for correcting vision. While not using the glasses, the image of a distant object in his case will be formed

An object is placed in front of a convex lens at a distance twice of focal length.A concave mirror is on the other side of the lens. The distance between lens and mirror is twice of the sum of their focal length.Find image distance, nature of image and the magnification.