Monochromatic light hits a piece of glass. What happens to the wavelength in the glass as the index of refraction increases?
a. decreases
b. increases
c. remains constant
d. approaches 3 × 10^8 m
a
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Which of the following is a contribution that Kepler made to astronomy?
A. He discovered his Three laws (of Planetary Motion). B. He discovered four moons (or satellites) of Jupiter. C. He discovered epicycles. D. He determined the size of Earth.
The figure below shows a planet traveling in a clockwise direction on an elliptical path around a star located at one focus of the ellipse. When the planet is at point A,
a.
its speed is constant.
b.
its speed is increasing.
c.
its speed is decreasing.
d.
its speed is a maximum.
e.
its speed is a minimum.
A 500-turn circular loop 15.0 cm in diameter is initially aligned so that its axis is parallel to the Earth's magnetic field. In 2.77 ms the coil is flipped so that its axis is perpendicular to the Earth's field. If a voltage of 0.166 V is induced in the coil, what is the value of the Earth's magnetic field?