Question

Define:-
Focal length
ii) covalent bond
Mention any two uses of concave mirror
Write any two uses of graphite.
Solvath
usla​

Answer 1

Explanation:

The Indian subcontinent, or, sometimes simply called the subcontinent, is a physiographical region in southern Asia, situated on the Indian Plate and projecting southwards into the Indian Ocean from the Himalayas. Geologically, the Indian subcontinent is related to the landmass that rifted from the supercontinent Gondwana during the Cretaceous and merged with the Eurasian landmass nearly 55 million years ago.[1] Geographically, it is the peninsular region in south-central Asia, delineated by the Himalayas in the north, the Hindu Kush in the west, and the Arakanese in the east.[2] Geopolitically, the Indian subcontinent generally includes all or part of Bangladesh, Bhutan, India, Nepal, Pakistan and Sri Lanka, as well as Maldives.[3][4][5][6] The terms Indian subcontinent and South Asia are sometimes used interchangeably to denote the region,