Compound Microscope: The distance between the object to be viewed and the eyepiece of a compound microscope is 25.0 cm. The focal length of its objective lens is 0.200 cm and the eyepiece has a focal length of 2.60 cm. What is the magnitude of the total magnification of the microscope when used by the person of normal eyesight if it is designed for minimum eyestrain?
A. 1070
B. 204
C. 520
D. 477
E. 772
Answer: A
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When charge Q1 is placed at point P1, the resulting potential at point P is V1 . When Q2 is placed at point P2 after Q1 is in position at P1, the resulting potential at P becomes V2 . What is the potential at point P if charge Q1 is then removed?
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A. gamma rays B. microwaves C. ultraviolet light D. visible light E. X-rays
The dilemma known as the ultraviolet catastrophe was resolved in 1900 by
a. Bohr. b. Rutherford. c. Einstein. d. Planck.