What is photon sphere and ergosphere???
Dear Student,
The photon sphere is the region where light can orbit the black hole. A beam of light travelling tangent to the black hole will stay in the photon sphere.while the ergosphere is the region where it is impossible for an object to appear stationary to an outside observer. This region's shape depends on the mass and angular momentum of the black hole.
The parts of the photon sphere can overlap the region of the ergosphere, and vice versa. Photons can be trapped in the photon sphere without always being in the ergosphere.
Regards,
The photon sphere is the region where light can orbit the black hole. A beam of light travelling tangent to the black hole will stay in the photon sphere.while the ergosphere is the region where it is impossible for an object to appear stationary to an outside observer. This region's shape depends on the mass and angular momentum of the black hole.
The parts of the photon sphere can overlap the region of the ergosphere, and vice versa. Photons can be trapped in the photon sphere without always being in the ergosphere.
Regards,