Explanation

Lactometer is used for milk

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A lactometer is an instrument that is used to check for the purity of milk by measuring its density.

 lactometer works on the principle of gravity of milk.

Sh10-8-2023

Explanation

In the early 1950s, the first successful vaccine was created by US physician Jonas Salk.

Salk tested his experimental killed-virus vaccine on himself and his family in 1953

First used Salk vaccine in 1955 ( in activated)

while 

A live attenuated (weakened) oral polio vaccine developed by Dr. Albert Sabin and first used in 1961.

Israel launched a polio vaccine drive after 1988 in April 2022

Explanation

Artificial Intelligence is a branch of Computer science, which aims to create intelligent machines so that machine can think intelligently in the same manner as a human does.

Note: John McCarthy is recognized as the father of Artificial Intelligence due to his astounding contribution in the field of Computer Science.

John McCarthy was an American computer scientist

Explanation

Jabir Ibn Hayyan (721–815 CE) was a pioneering Muslim scientist known as the father of early chemistry and a contributor to biological sciences.

Explanation

Benjamin Franklin invented the lightning rod, a device used to protect buildings from lightning strikes.

He made this invention in 1752 as part of his experiments with electricity.

Explanation

Dolly was the world's first cloned sheep.

Dolly was born on 5 July 1996.

Dolly was a female domestic sheep, and the first mammal cloned from an adult somatic cell, using the process of nuclear transfer.

Dolly was cloned by Ian Wilmut.

Explanation

Very high frequency is ITU designation for the range of radio frequency electromagnetic waves from 30 to 300 megahertz, with corresponding wavelengths of ten to one meters.

Explanation

John Logie Baird, a Scottish inventor, is best known for inventing the world's first working television system in the 1920s.

He revolutionizing communication and entertainment.

Explanation

Distant objects can be seen with the help of the Telescope

They produce an image that is larger than the image that can be seen with the unaided eye.

Telescopes gather far more light than the eye,

It allows dim objects to be observed with greater magnification and better resolution.

Explanation

Albert Einstein, a renowned physicist, revolutionized physics with his theory of relativity.

He made significant contributions to mathematics and philosophy as well.

Einstein is celebrated as one of the most influential physicists of the 20th century.

It notably publishing four landmark papers in 1905.