Question

Assertion: A brief exposure to extremely high sound level, 150dB or more generated by take off a jet plane or rocket, may damage eardrum or dislocate ear ossicles and permanently impair hearing ability.
Reason: In India, the air (prevention and Control of pollution) Act came into force in 1981, but was amended in 1987 to include noise as an air pollutant.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
C. Assertion is correct but Reason is incorrect.
D. Both Assertion and Reason are incorrect.

Answer 1

Hint: The decibel (dB) is a relative unit of size same to at least one 10th bel (B). It is used to express the ratio of 1 power or subject amount range to another, the logarithmic amount being referred to as the power range or area range, respectively, on logarithmic scale.

Complete answer:
To answer this question, first, we need to know about the air (prevention and Control of pollution) Act, 1981. It is an Act to give for the prevention, control and abatement of air pollution, for the establishment, in order to conduct the aforesaid purposes, of Boards, for conferring on and assigning to such Boards powers and features referring to thereto and for topics linked therewith.
Now, let us find the solution from the option.
In India, the Air (Prevention and Control of Pollution) Act got here into power in 1981, however became amended in 1987 to consist of noise as an air pollutant. A short term exposure to extraordinarily excessive sound range, one hundred fifty dB or extra generated with the aid of using takeoff of a jet aircraft or rocket, may also harm ear drums therefore completely impairing listening ability. Even continual exposure to a low stage noise (80 - one hundred dB) as determined in lots of industries and metropolitan towns close to the roads may also completely harm the listening capacity of humans.
Both the statement and reason are not incorrect.

Hence, the correct answer is option (B)

Note: The decibel is usually implemented in acoustics; it is far used as a used as a unit of sound strain stage. The reference density in the air is set as the threshold range of motion of a human. The decibel is used to signify the ratios of energy/amplitude in mathematics ratios in electronics. The general advantage of decibel may be calculated without difficulty with the aid of using including all decibel gains.