In video 2 for Chapter 17, they show a block of glass with 2 reflections of light. Why are there two?
A. The light refracts as it goes through the block, and this makes a second reflection.
B. Diffraction at the surface produces multiple images.
C. There is a reflection from the front of the block and from the back of the block
D. There is an additional reflection inside the camera lens.
Ans: C. There is a reflection from the front of the block and from the back of the block
You might also like to view...
You and your friend want to go to the top of the Eiffel Tower. Your friend takes the elevator straight up. You decide to walk up the spiral stairway, taking longer to do so
Compare the gravitational potential energy (U) of you and your friend, after you both reach the top. A) It is impossible to tell, since the times are unknown. B) It is impossible to tell, since the distances are unknown. C) Your friend's U is greater than your U, because she got to the top faster. D) Both of you have the same amount of potential energy. E) Your U is greater than your friend's U, because you traveled a greater distance in getting to the top.
A 120-V rms voltage at 60 Hz is applied across an RC circuit. The rms value of the current in the circuit is 0.60 A, and it leads the voltage by 60°. What is the resistance in this circuit?
A) 100 ? B) 60 ? C) 150 ? D) 200 ? E) 120 ?
The oscillation of the 2.0-kg mass on a spring is described by 
where x is in centimeters and t is in seconds. What is the force constant of the spring?
A.
B.
C.
D.
E.
N/mWhich object below has the lowest resistance? All three have length L and are made out of the same material