An observer whose least distance of distinct vision is 'd' views the his own face in a convex mirror of radius of curvature 'r' .Prove that magnification produced can not exceed `(r )/(d+sqrt(d^(2)+r^(2)) `

An observer whose least distance of distinct vision is'd' views the his own face in a convex mirror of radius of curvature 'r'.Prove that maginification produced can not exceed (r )/(d+sqrt(d^(2)+r^(2))

An observer views his own image in a convex mirror of radius of curvature R. If the least distance of distinct vision for the observer is d, calculate the maximum possible magnification.

Concave mirror object at d_1 from curvature of radius R and image at d_2 from C. Then,

A double convex lens ( R_(1)=R_(2)=10 cm ) having focal length equal to the focal length of a concave mirror. The radius of curvature of the concave mirror

The image of an object, formed by a combination of a convex lens (of focal length f) and a convex mirror (of radius of curvature R), set up as shown is observed to coincide with the object. Redraw this diagram to mark on it the position of the centre of the mirror. Obtain the expression for R in terms of the distances, marked as a and d, and the focal lenght f, of the convex lens.

Prove that the least perimeter of an isosceles triangle in which a circle of radius r can be inscribed is 6sqrt(3)r.

The power of a double convex lens of radius of curvature R each is Y. The power of a plano convex lens of same material and of radius of curvature 2R is

A convex lens, mu = 1.4 both sides R_1 , R_2 to radius of curvature of both sides. Focal length = ?

Radius of curvature of a equi convex lens is R. Find focal length ( n = 3/2 )

Radius of curvature of a equi convex lens is R. Find focal length ( n = 3/2 )