Question

Plzzz answer thiss.......i want it urgently dear frnds

Answer 1

(1) The object in between focus and optic centre

(2) The image is virtual , erect and magnified

(3)" l" is lens "O" is the object and "i" is the image

Hope it's helpful

Answer 2

Answer:

An electron in hydrogen atoum mAkes atranstion n1and n2 are principal quantum numbers of the two states