Thin Films: What is the minimum thickness of a soap bubble film with refractive index 1.38 that results in a constructive interference in the reflected light if this film is illuminated by a beam of light of wavelength 610 nm?
A. 222 nm
B. 111 nm
C. 333 nm
D. 444 nm
E. 555 nm
Answer: B
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If a 5°C piece of iron is heated until it has twice as much internal energy, its temperature will be
A) 10°C. B) 273°C. C) 278°C. D) 283°C. E) 556°C.
The space time diagram in figure R2.12 shows the world lines of various objects. Which object has the largest speed at time t = 4 s?
A. A
B. B
C. C
D. D
E. E
Fanning out of waves upon passing through an opening is more pronounced through
A) small openings. B) large openings. C) same for each D) none of the above
The area and the number of turns in a loop of wire are doubled. Assuming that all the other parameters remain the same, what happens to the induced emf in that loop of wire?
A) It is doubled. B) It is reduced by a factor of 2. C) It is reduced by a factor of 4. D) It is quadrupled. E) It stays the same.