Which of the following aberrations does not apply to mirrors?
A) astigmatism
B) chromatic
C) spherical
D) coma
B
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What observations demonstrate the existence of an interstellar medium?
What will be an ideal response?
Total Internal Reflection: An optic fiber is made of clear plastic with an index of refraction of 1.50. For what range of angles of incidence ? with the lateral surface of the fiber will light remain inside the plastic "guide" if it is surrounded by air?
A. 21.1° < ? < 90° B. 23.4° < ? < 90° C. 38.3° < ? < 90° D. 40.3° < ? < 90° E. 41.8° < ? < 90°
The lowest layer of Earth's atmosphere is called the ________.
A. terrasphere B. ionosphere C. stratosphere D. ozone layer E. troposphere
A mass is oscillating on a spring with a period of 4.60 s. At t = 0 s the mass has zero speed and is at x = 8.30 cm. What is its speed at t = 2.50 s?
A) 10.9 cm/s B) 3.06 cm/s C) 3.32 cm/s D) 1.80 cm/s E) 0 cm/s