A ray of light strikes a thick sheet of glass (n = 1.5) at an angle of 20° with the normal. Find the angle of the refracted ray within the glass with respect to the normal
a. 31°
b. 0.23°
c. 37°
d. 13°
e. 20°
d
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Two flat rings each having outer diameter of 6 inches and inner diameter of 3 inches are parallel and 4 inches apart as shown. Determine the shape factors, F1-2 and F2-1, which are equal.
Exclusion Principle: Which one of the following is the correct electronic configuration for the sodium atom, which has 11 electrons?
A. 1s1 2s2 3p6 2s2 B. 1s2 2s1 3p6 2s2 C. 1s1 2s2 2p6 2s2 D. 1s2 2s2 2p6 3s2 E. 1s2 2s2 2p6 3s1
The energy difference between adjacent orbit radii in a hydrogen atom
A) decreases with increasing values of n. B) increases with increasing values of n. C) remains constant for all values of n. D) varies randomly with increasing values of n.
A microscope has an objective lens of focal length 1.4 mm and an eyepiece of focal length 20 mm, adjusted for minimum eyestrain. A blood sample is placed 1.5 mm from the objective
How far apart are the lenses? A) 20 mm B) 21 mm C) 23 mm D) 33 mm E) 41 mm