Limiting Magnitude of a Telescope A telescope is limited in its usefulness by the brightness of the star that it is aimed at and by the diameter of its lens. One measure of a star's brightness is its magnitude; the dimmer the star, the larger its magnitude . A formula for the limiting magnitude L of a telescope, that is, the magnitude of the dimmest star that it can be used to view, is given by L = 9 + 5.1 log d where d is the diameter (in inches) of the lens. (a) What is the limiting magnitude of a 3.5 − inch telescope? (b) What diameter is required to view a star of magnitude 14?
Limiting Magnitude of a Telescope A telescope is limited in its usefulness by the brightness of the star that it is aimed at and by the diameter of its lens. One measure of a star's brightness is its magnitude; the dimmer the star, the larger its magnitude . A formula for the limiting magnitude L of a telescope, that is, the magnitude of the dimmest star that it can be used to view, is given by L = 9 + 5.1 log d where d is the diameter (in inches) of the lens. (a) What is the limiting magnitude of a 3.5 − inch telescope? (b) What diameter is required to view a star of magnitude 14?
Solution Summary: The author explains the limiting magnitude of a 3.5 inch telescope.
Limiting Magnitude of a Telescope A telescope is limited in its usefulness by the brightness of the star that it is aimed at and by the diameter of its lens. One measure of a star's brightness is its magnitude; the dimmer the star, the larger its magnitude. A formula for the limiting magnitude L of a telescope, that is, the magnitude of the dimmest star that it can be used to view, is given by
where d is the diameter (in inches) of the lens.
(a) What is the limiting magnitude of a
telescope?
(b) What diameter is required to view a star of magnitude 14?
Expert Solution
To determine
To find:
a. What is the limiting magnitude of a inch telescope?
Answer to Problem 48RE
a.
Explanation of Solution
Given:
Calculation:
a.
Expert Solution
To determine
To find:
b. What diameter is required to view a star of magnitude 14?
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