GENERAL KNOWLEDGE

GK

PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Does a beam of light ‘fall’ if it is moving through a gravitational field?
A
Yes
B
No
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -Yes, light is affected by gravity, but not in its speed. General Relativity (our best guess as to how the Universe works) gives two effects of gravity on light. It can bend light (which includes effects such as gravitational lensing), and it can change the energy of light.

Detailed explanation-2: -Gravity bends light Although light seems to be pretty unfazed by gravity, Einstein predicted that this is not always the case. Light travels through spacetime, which can be warped and curved-so light should dip and curve in the presence of massive objects.

Detailed explanation-3: -1) Gravity does indeed affect light. All light in the presence of a gravitational source either “bends” or shifts its frequency, but unless the gravitational field is extremely strong it’s difficult or impossible to detect with the naked eye.

Detailed explanation-4: -While it is true that photons have no mass, it is also true that we see light bend around sources with high mass due to gravity. This is not because the mass pulls on the photons directly, but instead because the mass warps the space-time through which the photons travel.

There is 1 question to complete.