Dual nature of light and related questions

How light has a dual nature? A photon has zero rest mass. Explain how ? (These questions were posted by Shubham SInha  and Ritika Chatak) Answer: The dual nature of light has been established through the various theories in an attempt to find out the real nature of light. The first theory on the nature of…… Continue reading Dual nature of light and related questions

What is twin paradox?

TWIN PARADOX is a paradoxical situation coming in while explaining the theory of relativity. “Time dilation” is one of the important consequences of relativity. It says that if a body is moving with relativistic speeds, time will dialate …

Is the acceleration due to gravity different in south pole and north pole

Mohak Tandon Asks – “
“Is the acceleration due to gravity different in south pole and north pole?”
Answer:
As per theory, acceleration due to gravity changes with altitude, depth and latitude.
If we consider that the variation of g with latitude is caused by rotation of earth only, then the value of g will be same for both […]

Why Rainbow is in the form of an arc?

Why is a rainbow always bent in the shape of a semi circle…?? but according to the theory light travels straight….!!! (Ramesh asked)

A question based on the theory of machines

†ђe fig below shows a tilt hammer ahinged at o, with its head resting on top of †ђe pile Bm †ђe hammer including †ђe arm OA, has a mass of 25kg.its centre of gravity Gis 400mm horizontally. from O Ąπϑ its radius of gyration about an axis through G parallel to †ђe axis of †ђe […]

CBSE Rules for Improvement of Performance

 Improvement of Performance  Senior School Certificate Examination **(i) A candidate who has passed an examination of the Board may reappear for improvement of performance in one or more subject(s) in the main examination in the succeeding year only; however, a candidate who has passed an examination of the Board under Vocational Scheme may reappear for […]

CBSE Rules for Compartment Examinations

Compartment Examination for Secondary/Senior School Certificate Examination ** (i) A candidate placed in compartment may reappear at the compartmental examination to be held in July/August and may avail himself/herself of the second chance in March/April next year and may further avail himself/herself of the third chance at the compartmental examinations to be held in July/August […]