Total Internal Reflection

You can determine the index of refraction of a substance by determining its critical angle. (a) What is the index of refraction of a substance that has a critical angle of \(68.4^{\circ}\) when submerged in water? What is the substance, based on Table 1.1? (b) What would the critical angle be for this substance in air?

Text Transcription:

68.4 degrees

Class – 9/9/2016, Kinematics Dr. Ilia Gogoladze th Physics by Walker, 4 edition Instantaneous Velocity - V = lim →0 - SI unit: meter per second, m/s - This means that we evaluate the average velocity over a shorter and shorter periods of time; as that time becomes infinitesimally small, we have the instantaneous velocity Acceleration - Acceleration Is the rate at which velocity changes with time. The change in velocity may be in magnitude, in direction, or in both - Acceleration = change in velocity/time interval − - aav= = − 2 - SI unit: meter per second per second= m/s - When the velocity and acceleration of an object have the same sign, the speed of the object increases o The velocity and acceleration point in the same direction - When the velocity and acceleration of an object have opposite signs, the speed of the object decreases o The velocity and acceleration point in the opposite directions. Instantaneous Acceleration - a = lim →0 - SI unit: m/s Class – 9/9/2016, Kinematics Dr. Ilia Gogoladze Physics by Walker, 4 edition Constant Acceleration Equations of Motions Variables Related Equations Velocity, time, acceleration V