What is the total magnification of a refracting telescope having an objective and eyepiece lens of focal lengths 30.0 cm and 0.40 cm respectively?

The total magnification of a refracting telescope is -75

Explanation:

f₀ = 30 cm

= 0.40 cm

Magnification in telescope => m = - f₀ /  

                                                    m = - 30 / 0.040

                                                    m = -75

Magnification in telescope = -75

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