Which scientist does not belong to Germany?
Heinrich Rudolf Hertz was a German physicist who first conclusively proved the existence of the electromagnetic waves predicted by James Clerk Maxwell's equations of electromagnetism.
Werner Karl Heisenberg was a German theoretical physicist and one of the key pioneers of quantum mechanics.
Wilhelm Conrad Röntgen was a German mechanical engineer and physicist
Niels Henrik David Bohr was a Danish physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922.
Who discovered radioactivity?
Marie Curie became the first woman to be awarded the nobel prize and the first person to obtain two nobel prizes when she won the prize for the discovery of Polonium and Radium in 1911. Though it was Henri Becquerel that discovered radioactivity, it was Marie Curie who coined the term. The radioactivity of uranium was discovered in 1896 by Henri Becquerel.
Which is the strongest fundamental force of nature?
The strong nuclear force, also called the strong nuclear interaction, is the strongest of the four fundamental forces of nature.
Which force operates among the heavier elementary particles?
Strong nuclear force operates among the heavier elementary particles and the nucleons.
Electromagnetic force is stronger than gravitational force by a factor of:
Electromagnetic force is stronger than gravitational force by a factor of 1036.
Who discovered ultra-short radio waves?
Jagadish Chandra Bose attended Cambridge after studying physics at Calcutta University. He was the first to demonstrate radio communication with millimetre wavelengths, which fall in the 30GHz to 300GHz spectrum.
The wave nature of electrons is used in which of the following devices?
Electron microscope uses the wave nature of electrons for its functioning.
According to Einstein’s theory, mass and energy are related as
Einstein's equation E = mc2 shows that energy and mass are interchangeable. The theory of special relativity explains how space and time are linked for objects that are moving at a consistent speed in a straight line. One of its most famous aspects concerns objects moving at the speed of light.
On which laws, is the principle of rocket propulsion based?
The phenomenon of Photoelectric effect is used in
A photocell is a practical application of the phenomenon of photoelectric effect. When light of frequency greater than the threshold frequency of the cathode material falls on the cathode, photoelectrons are emitted. These electrons are collected by the anode and an electric current starts flowing in the external circuit. The current increases with the increase in the intensity of light. The current would stop, if the light does not fall on the cathode.