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What does Angstrom measure?
উত্তর
length of light waves
সমাধান
Angstrom (Å), unit of length, equal to 10−10 metre, or 0.1 nanometre.
It is used chiefly in measuring wavelengths of light.
(Visible light stretches from 4000 to 7000 Å.) It is named for the 19th - century Swedish physicist Anders Jonas Ångström.
২২৬৪৫
The name of currency of Hong Kong is:
উত্তর
Hong Kong Dollar
সমাধান
The Hong Kong dollar is the official currency of Hong Kong.
It is subdivided into 100 cents.
The Hong Kong Monetary Authority is the governmental currency board and also the de facto central bank for Hong Kong and the Hong Kong dollar.
২২৬৪৭
In which of the following countries the business of banking started first?
উত্তর
Italy
সমাধান
Development of banking spread from northern Italy throughout the Holy Roman Empire, and in the 15th and 16th century to northern Europe.
This was followed by a number of important innovations that took place in Amsterdam during the Dutch Republic in the 17th century, and in London since the 18th century.
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What is the difference between Bangladesh Standard Time and Greenwich Mean Time?
উত্তর
6 hours