This may be a dumb question , but as light travels from the sun to Earth , each photon has its own gravitational field , so when the light hits Earth does the gravitational field of Earth become stronger.
D H said:No. For one thing, the effect would be tiny. For another, it doesn't exist. QUOTE]
What doesn't exist , okay so its tiny but its their .
You don't need mass , to create a gravitational field , In relativity mass or energy bends space time , and if the field associated with the photon goes away where does the field go or the energy , doesn't the energy from the photon still create a field .clustro said:DH... did you post in the right thread?
And cragar: I am pretty sure to have a gravitational field, you need mass. Photons don't have mass, so they don't have the field, and therefore can't contribute to Earth's gravity field.
of course, even if they had mass, you have to assume that all photons impinging upon the Earth actually stay on the earth, leading to a buildup of mass.
Seems weird, no?
clustro said:DH... did you post in the right thread?
The Earth is in thermal equilibrium. The incoming solar radiation is balanced by outgoing radiation, mostly thermal. Think of the Earth as an energy-neutral frequency converter.ou have to assume that all photons impinging upon the Earth actually stay on the earth, leading to a buildup of mass.
Photons carry energy. Energy, like mass, curves space-time. (Mass is energy.)And cragar: I am pretty sure to have a gravitational field, you need mass. Photons don't have mass, so they don't have the field, and therefore can't contribute to Earth's gravity field.
The gravity field of the earth refers to the force of gravity exerted by the earth on objects near its surface. It is what keeps objects on the earth's surface from floating away into space.
The gravity field of the earth is measured using a device called a gravimeter. This instrument measures the strength of the gravitational pull at a specific location on the earth's surface.
The gravity field of the earth affects objects by pulling them towards the center of the earth. This force is what gives objects weight and determines their acceleration towards the earth's surface.
No, the gravity field of the earth is not the same everywhere. It varies depending on factors such as altitude, latitude, and the density of the materials beneath the surface. This is why objects may weigh slightly more or less in different locations on the earth.
Yes, the gravity field of the earth can change over time. It can be affected by natural events such as earthquakes and volcanic eruptions, as well as human activities such as mining and construction. However, these changes are usually very small and not noticeable to humans.