Suppose you take the eyepiece out of a microscope and replace it with an eyepiece having twice the focal length. The magnification of the microscope will

A. double.
B. halve.
C. remain unchanged.
D. quadruple.
E. none of these.


B. halve.

Physics & Space Science

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At what point is the Moon closest to Earth?

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A substance has a melting point of 20°C and a heat of fusion of 3.9 x 104 J/kg. The boiling point is 150°C and the heat of vaporization is 7.8 x 104 J/kg at a pressure of 1.0 atm

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The vibrational frequency of an HF molecule is 8.72 × 1013 Hz and the reduced mass of the molecule is 1.589 × 10-27 kg

What is the ground state vibrational energy of an HF molecule? (1 eV = 1.60 × 10-19 J, h = 1.055 × 10-34 J ? s, h = 6.626 × 10-34 J ? s) A) 0.30 eV B) 0.18 eV C) 0.12 eV D) 0.36 eV E) 0.24 eV

Physics & Space Science