A magnifying lens of refractive power d (in diopters) gives what magnification when the viewing eye is relaxed assuming a near point of 25 cm?
a. 25d
c. 0.25/d
b. d/4
d. The correct answer is not given.
B
Physics & Space Science
You might also like to view...
Stars support their weight by generating ____
a. magnetic fields throughout the star b. magnetic fields throughout the star c. energy in their centers d. magnetic-plasmas at their core e. energy-plasmas at their core
Physics & Space Science
What happened to Venus's water?
A. A runaway greenhouse effect caused the water to be frozen in permanent ice caps. B. Venus still has all of its water, it has just become vapor in the atmosphere. C. Venus never had any water. D. Greenhouse warming caused its oceans to evaporate, and then its hydrogen was lost to space.
Physics & Space Science
Power is a vector quantity
Indicate whether the statement is true or false
Physics & Space Science
How many quark flavors are there?
a. 1 c. 6 b. 3 d. none of the above
Physics & Space Science