Question

Q. An object is placed before a concave lens of focal
length 12 cm. The size of the image formed by the
lens is half the size of the object. Calculate the
distance of the object from the lens.
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Answer 1

Answer:

Agriculture is one of the major sectors of the Indian economy. It is present in the country for thousands of years. Over the years it has developed and the use of new technologies and equipment replaced almost all the traditional methods of farming. Besides, in India, there are still some small farmers that use the old traditional methods of agriculture because they lack the resources to use modern methods. Furthermore, this is the only sector that contributed to the growth of not only itself but also of the other sector of the country.