Does gravity travels instantaneously? Or it travels equal to the speed of light. Answer: No clear answer now. If we believe in the Theory of relativity, Gravity (Gravitational Waves travel with the same speed as that of light in vacuum. If gravitons are like photons, then it makes sense too. However I invite you to think … Continue reading Does gravity travel instantaneously?
When an object of height 4cm is placed at 40cm from a mirror the mirror forms the image on the object itself. If the height of the image is equal to the height of the object. Find out the focal length of the mirror and identify the mirror. A convergent beam of light passes through … Continue reading Numerical Problems From Optics
Why sound travels faster in humid air than normal air as humid air is denser than normal air? (Akash asked) Answer: The speed of sound in a medium is inversely proportional to the square root of its density. Humid air is less dense than dry air. Therefore the speed of sounf in humid air is greater than that in … Continue reading Speed of sound
What is present in between the atoms of gases? (Aniket Mukherjee asks) Answer: Nothing. Vacuum