Object at `2F_1`: image at `2F_2`:: object at `F_1`:_____.

Considering the correlation between the word of the first pair , pair of third word accordingly with proper answer OR write the correlated answer: Object at 2F_1 of a convex lens : image at 2F_2 :: Object at F_1 : ……………..

A convex lens of focal length f produces a real image 3 times as that of size of the object, the distance between the object and the lens is

A concave lens of focal length f produces an image (1)/(4) of the size of the object, the object should be kept at ____ from the lens.

Solve the numerical problem For a concave mirror, with f= -3 cm , object distance u = -10 cm and the height of the object h_(1) = 2 cm. Find the position, size and nature of the image.

If an object is placed between F_1 and 2F_1 of a convex lens, then nature of the image formed is__.

Choose the correct alternative and write it along with its alloted alphabet: When an object is placed at 2F_1 of a convex lens its image is formed………….

Draw well labelled diagram for the following: A ray diagram for object position at 2F1 for a convex lens

Choose the correct alternative and write it along with its alloted alphabet: When an object is placed between O and F_1 in front of a convex lens , the image formed is……..

An astronomical telescope has an angular magnification of magnitude 5 for distant object. The separation between the objective and the eyepiece is 36 cm and the final image is formed at infinity. The focal length f_(0) of the objective and the focal length f_(0) of the eyepiece are