Question

8. It was the marriage party of Reena's elder sister. Reena noticed two twin sisters who
were invited to the party wore identical gold necklaces. But she was surprised when
she came to know that both the ornaments were not of gold. Only one of them was
of gold. In the above situation, the following questions arose in her mind.
Answer the following questions:-
a) Which necklace was of real gold and which was not?
b) How was it possible that some ornaments were not made of gold but appeared
to be so?
c) Define the process for this appearance.
d) Give other two applications of this technology.
e) Do the imitation ornaments shine permanently?
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Answer 1

Explanation:

Blessed are the six seasons of Bengal. These seasons are summer, monsoon, autumn, fall, winter and spring. They come one after the other. The Bengali year begins with summer. April and May are the summer months. This month people suffer from heatstroke. Juicy fruits grow in this season. Then comes the rain. Monsoon with June, July and August. The sky is covered with black clouds. Rivers, canals, ponds, etc. are flooded with rain water.