An object starts moviing at an angle of `45^(@)` with the principal axis as shown in figure. In front of a biconvex lens of focal length `+10cm` . If `theta` denotes the angle at which image starts to move with principal axis, then

An object of height 5 cm is placed at 30 cm distance on the principal axis in front of a concave mirror of focal length 20 cm. Find the Image distance and size of the image.

A point object (O) lies at a distance of 20 cm on the principal axis of a convex lens of focal length f = 10 cm . The object begins to move in a direction making an angle of 45° with the principal axis. At what angle with the principal axis does the image beings to move?

Point object O is placed on the principal axis of a convex lens of focal length 20cm at a distance of 40 cm to the left of it. The diameter of the lens is 10cm to the right of the lens at a distance h below the principal axis, then the maximum value of h to see the image will be

Point object O is placed on the principal axis of a convex lens of focal length 20cm at a distance of 40 cm to the left of it. The diameter of the lens is 10cm to the right of the lens at a distance h below the principal axis, then the maximum value of h to see the image will be

A light ray travelling parallel to the principal axis of a convex lens of focal length 12 cm strikes the lens at a height of 5 mm from the principal axis. What is the angle of deviation produced?

Monochromatic light rays parallel to the principal axis (the x axis) are incident on a convex lens of focal length f. If the lens oscillates such that it tilts up to a small angle theta on either side of the y axis, then find the distance between the exterme positions of the image. Take sec theta ~~ 1 + (theta^(2))/(2) for small theta .