A slab of material 1 rests on the surface of a slab of material 2 . A light ray in material 1 has an angle of incidence of 30° on the interface between the materials, while the ray in material 2 has an angle of refraction of 45°. What is the critical angle of incidence for total internal reflection for a ray of light going from material 2 to material 1?

a. 30°
b. 45°
c. In this case there is no critical angle.
d. At least one of the indices of refraction or its equivalent is needed to solve this problem.


B

Physics & Space Science

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Physics & Space Science

A bullet is fired horizontally with an initial velocity of 300 m/s from a 20-m high tower. If air resistance is negligible, the bullet hits downrange about

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Two vectors, of magnitudes 20 mm and 50 mm, are added together. Which one of the following is a possible value for the magnitude of the resultant?

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Physics & Space Science

A simple pendulum takes 2.00 s to make one compete swing. If we now triple the length, how long will it take for one complete swing?

A) 6.00 s B) 3.46 s C) 2.00 s D) 1.15 s E) 0.667 s

Physics & Space Science