Find the power of the eye lens of the normal eye when it is focussed at its
far point.

Find the power of the eye lens of the normal eye when it is focussed at its near point. Assume the distance of the retina from the eye lens to be 2.5 cm.

Find the power of a convex lens of focal length 25 cm.

Find the power of a concave lens of focal length 2 m ?

Make a diagram to show how hypermetropia. is corrected. The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? Assume that the near point of the normal eye is 25 cm.

Find the equation of the normal to the curve y^2= 16x at the point (4,8).

Find the equation of the tangent and normal to the following curve at the given point : x^3+y^3=2 at (1,1)

Find the equation of the tangent and normal to the following curve at the given point : y=root(3)(5-x) , at (-3,2)

Find the equation of the tangent and normal to the following curve at the given point : y=x^2 at (2,4)

Find the equation of the tangent and normal to the following curve at the given point : y^2=12x at (3,6)

Find the equation of the tangent and normal to the following curve at the given point : y=x logx+1 at (1,1)