Why can visibility decrease when dust and smoke are high in air?
Answer and explanation
Correct answer: They scatter and obstruct light
Dust and smoke add fine particles to the air. These particles scatter incoming and reflected light in many directions, while a dense layer can also absorb or block part of the light path. The result is haze and reduced contrast, so distant objects become difficult to see. Option D is correct; the particles do not increase oxygen, solidify nitrogen, or remove water vapour as their main effect.
Frequently asked questions
What is the correct answer to this question?
They scatter and obstruct light
Why is this the correct answer?
Dust and smoke add fine particles to the air. These particles scatter incoming and reflected light in many directions, while a dense layer can also absorb or block part of the light path. The result is haze and reduced contrast, so distant objects become difficult to see. Option D is correct; the particles do not increase oxygen, solidify nitrogen, or remove water vapour as their main effect.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Depreciation, Provisions, and Reserves.
