What is the resolution of a telescope?
A) Its ability to see very faint objects
B) Its ability to distinguish two adjacent objects close together in the sky
C) Its ability to make distant objects appear much closer to us
D) Its ability to separate light into its component colors for analysis
E) Its ability to focus more than just visible light for imaging
B
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A(n) ____________________ is observed if our line of sight is along the rotation axis of an active galactic nucleus
Fill in the blank(s) with correct word
A hydrogen atom initially in the n = 6 state decays to the n = 2 state. The emitted photon is detected in a photographic plate. What is the wavelength of the detected photon?
The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s) A) 1090 nm B) 93.1 nm C) 410 nm D) 93.8 nm
A 120-? laboratory resistor is rated at 0.25 W. How much current can safely flow through the resistor?
A) 30 A B) 2.1 mA C) 22 mA D) 46 mA
Which of the following is a negatively charged polyatomic ion?
a. Ammonium ion b. Oxide ion c. Sodium ion d. Nitrate ion