Question

What do you mean by boalis​

Answer 1

Answer:

Definition: An achromatic lens can be defined as a lens which is made by a combination of two different types of lenses carrying different focal powers in a manner such that the images formed by the light of both the combined lenses are free from chromatic aberration or achromatism. ... It is widely known as an 'achromat'.

Hope it helps you

Answer 2

Explanation:

boalis are stepwells in which water is reached by going down a set of steps.

they are common in the arid parts of Western India such as Rajasthan

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