Question

You happened to notice a lot of garbage strewn in your locality. The inefficiency of the authorities in clearing the garbage on time has resulted in an unbearable stink. The people feel that this indifference is sure to spread diseases. Write a letter in about 100 �120 words to the editor of a newspaper on this problem and what you think can be done to curb this menace. You can take help from the unit on ‘Environment’ and the hints given below. You are Raju/Renuka, 251, Gitanjali Apartments, Delhi. 5 • Proper garbage dumping facility • The civic sense in people • Resident association to take charge • Authorities to be alert

Answer 1

Answer:

A concave lens is a lens that possesses at least one surface that curves inwards. It is a diverging lens, meaning that it spreads out light rays that have been refracted through it. A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia).xddd