Hypothetically stopping time while still being able to observe the world is an intriguing concept. However, it is important to note that this idea falls outside the realm of our current scientific understanding and is purely speculative. Given the hypothetical scenario you've presented, here's a speculative interpretation of what might happen to light and gravity:
Light: If time were stopped, the propagation of light would also come to a halt. Light travels through space as electromagnetic waves, and these waves are governed by the fundamental laws of physics, including the passage of time. If time were frozen, the progression of light waves would freeze as well. As a result, light would not be able to move or interact with objects, and everything would appear motionless.
Gravity: Gravity is the force that arises due to the curvature of spacetime caused by mass and energy. In the hypothetical scenario of stopped time, the gravitational effects would likely remain unchanged. Gravity is not directly dependent on the passage of time but rather on the distribution of mass and energy. Therefore, the gravitational fields generated by massive objects would still persist even if time were frozen. However, the effects of gravity, such as the motion of celestial bodies or the curvature of spacetime, would be suspended during the frozen time period.
It's important to reiterate that the notion of stopping time and its implications are purely speculative and fall beyond the boundaries of our current scientific understanding. Our understanding of physics, particularly in relation to time, light, and gravity, is based on observed phenomena and mathematical models that operate within the framework of time progression.