6 mm
The most commonly used formula in amateur astronomy is used to calculate the magnification of a telescope: magnification = focal length of telescope / focal length of eyepiece. Example: using a 10mm eyepiece in a telescope with a focal length of 1000mm results in a magnification of 100x (1000 / 10 = 100)
17.5 cm
The most commonly used formula in amateur astronomy is used to calculate the magnification of a telescope: magnification = focal length of telescope / focal length of eyepiece. Example: using a 10mm eyepiece in a telescope with a focal length of 1000mm results in a magnification of 100x (1000 / 10 = 100)
both objective and eye-piece have short focal lengths
Magnifying power of a compound microscope is high if both objective and eye-piece have short focal lengths
the objective has a long focal length and the eye-piece has a short focal length
The magnifying power of telescope is high if the objective has a long focal length and the eye-piece has a short focal length
a converging lens of focal length 100 cm
A lens of power + 2.0 D is placed in contact with another lens of power ? 1.0 D. The combination will behave like a converging lens of focal length 100 cm