“Yes and no ! Imagine two worlds, for example,. In both an electron is orbiting the nucleus of an atom ……….”
“Like planets around the sun………….” Gangadharpant interjected.
“Not quite. We know the precise trajectory of the planet. The electron could be orbiting in any of a large number of specified states. These states may be used to identify the world. In state no. 1 we have the electron in a state of higher energy. In state no. 2 it is in a state of lower energy. It can make a jump from high to low energy and send out a pulse of radiation. Or a pulse of radiation can knock it out of state no. 2 into state no. 1. Such transitions are common in microscopic systems. What if it happened on a macroscopic level?” Rajendra said.
“I get you! You are suggesting that I made a transition from one world to another and back again?” Gangadharpant asked.
Questions:
Q.1. Pick out correct sentence/s from the following:
A. In both the worlds an electron is orbiting the nucleus of an atom.
B. Planets move along their fixed path.
C. Electrons do not move along the same path.
D. All of these three
Q.2. We can identify the world by knowing ……………..
A. the movement of planets.
B. the movement of electrons.
C. the specified states with higher or lower energies.
D. Both ‘A’ and ‘B’
Q.3. ……………. is responsible for transitions in states.
A. Pulse of radiation
B. Microscopic system
C. Changes in the number of electrons
D. Orbiting of planets.
Q.4. The meaning of the word ‘trajectory’ is the extract is ………………..
A. ‘movement’. B. ‘path or passage’
C. ‘change’. D. ‘function’.