A laser beam strikes a plane reflecting surface with an angle of incidence of 37°. What is the angle between the incident ray and the reflected ray?
What will be an ideal response?
74.°
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Spherical Mirrors: A beam of light that is parallel to the principal axis strikes a concave mirror. What happens to the reflected beam of light?
A. It also is parallel to the principal axis. B. It is perpendicular to the principal axis. C. It passes through the center of curvature of the mirror. D. It passes through the focal point of the mirror. E. It passes between the focal point and the center of curvature of the mirror.
Which of the following quantities is equal to the time constant for a charging capacitor?
a) the time it takes a capacitor to reach 33% of its maximum charge b) the time it takes a capacitor to reach 50% of its maximum charge c) the time it takes a capacitor to reach 66% of its maximum charge d) the time it takes a capacitor to reach 75% of its maximum charge e) the time it takes a capacitor to reach its maximum charge
When observing a very distant quasar, we are actually seeing the universe the way it was when it was much younger than it is today
Indicate whether the statement is true or false
Based on observations of the universal expansion, the age of the universe is about ________
A) 14,000 years B) 14 billion years C) 14 million years D) 14 trillion years