A ray of light traveling from air into crown glass strikes the surface at an angle of 30 degrees. The speed of light in the glass is 1.97. What will the angle of refraction be?

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.