Light and inertia

People tend to ask question does like have inertia. why can't we say light has infinite inertia.. cause inertia is ability to resist change in state.. and lights state of motion can never be changed (of course vacuum) ..

Question

Light and inertia

People tend to ask question does like have inertia. why can't we say light has infinite inertia.. cause inertia is ability to resist change in state.. and lights state of motion can never be changed (of course vacuum) ..

anonymous · Answer

Inertia is a property closely linked to mass in the general sense. A body with higher mass has a higher inertia. By your statement, this would mean light has infinite mass.
More fundamentally, Inertia is also the property of tendency of staying at rest. You just cannot have a body with infinite inertia moving at all. Light is never at rest. For these reasons, you can see that saying light has infinite inertia is contradictory.

anonymous · Answer

no inertia is not a property of tendency to stay at rest.. thats wrong.. its a property to stay at whatever state the body is in.. (state of rest or motion).. since light is in motion.. its staying in motion..