ARDMS (American Registry for Diagnostic Medical Sonography) Practice Test

Which name describes how the angles of the incident and transmission beams are related to the speed of the two media?

1. Bernoulli's principle

2. Curie point

3. Huygens' principle

4. Snell's law

The correct answer is: Snell's law

Snell's Law describes how the angles of the incident and transmission beams are related to the speed of the two media. It is also known as the Law of Refraction in physics. This law states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities of light in the two media. This relationship is essential in understanding how light rays bend as they pass from one medium to another, such as from air to water or from water to glass. Option A, Bernoulli's principle, is related to fluid dynamics and describes the relationship between the pressure and velocity of a fluid. Option B, Curie point, refers to the temperature at which a ferromagnetic material loses its magnetic properties. Option C, Huygens' principle, explains how every point on a wavefront can be considered as a source of secondary wavelets that combine to form the wavefront in the next time period.