A grating with 396 lines/mm is illuminated with light of wavelength 343 nm. What is the angular separation between the two second-order bright fringes?
A) 31.5°
B) 15.8°
C) 32.9°
A
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Two charged particles attract each other with a force F. If the charges of both particles are doubled, and the distance between them also doubled, then the force of attraction will be
A) F. B) 2 F. C) F/2. D) F/4. E) none of the above
Light of wavelength 550 nm in air is found to travel at 1.96 × 108 m/s in a certain liquid. Determine
(a) the frequency of the light in the liquid. (b) the wavelength of the light in the liquid.
Which process will double the power given off by a resistor?
a. doubling the current while doubling the resistance b. doubling the current by making a resistance half as big c. doubling the current by doubling the voltage d. doubling the current while making the voltage half as big
A very delicate sample is placed 0.150 cm from the objective lens of a microscope. The focal length of the objective is 0.140 cm, and that of the eyepiece is 1.0 cm. The near-point distance of the person using the microscope is 25.0 cm
The magnitude of the final magnification of the microscope is closes to A) 375. B) 300. C) 250. D) 125. E) 100.