What is the least value for an index of refraction?
A. 0
B. 0.5
C. 1
D. just less than 1
E. (1/2)1/2
C. 1
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A seesaw made of a plank of mass 10.0 kg and length 3.00 m is balanced on a fulcrum 1.00 m from one end of the plank. A 20.0-kg mass rests on the end of the plank nearest the fulcrum
What mass must be on the other end if the plank remains balanced? A) 6.67 kg B) 7.50 kg C) 10.0 kg D) -10.0 kg E) 5.00 kg
A diffraction grating has 450 lines per mm. What is the highest order m that contains the entire visible spectrum from 400 nm to 700 nm?
A) m = 2 B) m = 3 C) m = 4 D) m = 5 E) m = 6
Matter falling onto a compact object, such as a neutron star or black hole,forms a(n):
a. accretion disk b. binary star c. gamma-ray burst d. pulsar e. magnetar
Which of the following lenses is a diverging lens?
A. A B. B C. C