An experiment wanted to find the speed of light in a substance. When a laser beam entered the substance with an incident angle of 30°, the angle of refraction was found to be 22°. What value for the speed of light would the experimenter obtain with this data? (The speed of light in air is approximately 3x10⁸ m/s.)​

2.25 × 10⁸ m/s

Explanation:

Using Snell's Law,

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.