1. 3 It occurs when angle of incidence is greater than a certain limiting angle, called critical angle.

2. 2 It occurs when the angle of incidence is greater than a certain limiting angle, called the critical angle .

3. The range of incidence angles of the focused light rays (7) contains the critical angle of the total reflection.

4. At just this particular angle, called the critical angle, the surface of the water reflects the light like a mirror.

5. In aerodynamics , a stall occurs when the critical angle of attack is exceeded, causing loss of lift and a large increase in drag due to disruption of airflow.

6. However, the extremely high angle of attack of the body (30 ° angle has been observed during breaking flight before landing) still remains lower than the critical angle of attack.

7. In like manner, when the light is injected into the glass threads at the critical angle or less, it is internally reflected inside the fiber, mirrorlike, with very little light escaping.

8. For both the sharp and blunt notch solutions, the deviatoric strain energy density function predicts a larger absolute value of the critical angle θc than does the total strain energy density function.

9. Bytownite (Feldspar) Color: Pale yellow to brown Moh’s Hardness: 6-6.5 Refractive Index: 1.52-1.568 Critical Angle: 41.14° Specific Gravity: 2.56-2.70 Cleavage: Perfect Fracture: Uneven, can be brittle Dispersion: .012 Heat Sensitivity: Moderate in my experience Dichroism: Weak