If light from a 560 nm monochromatic source in air is incident upon the surface of fused quartz (n = 1.56) at an angle of 70°, what is the wavelength of the ray refracted within the quartz?
a. 560 nm
c. 192 nm
b. 874 nm
d. 359 nm
D
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An LED emits light of wavelength 600 nm. What is its band gap?
a. 1.11 eV b. 1.54 eV c. 1.99 eV d. 2.07 eV e. 2.33 eV
Two objects with indices of refraction n1 and n2 are placed in the same liquid substance and have their critical angles measured. If experiment shows that ?c1 > ?c2, then it must also be true that
1. n1 < n2. 2. n1 > n2. 3. n1 = n2. 4.more must be known to determine the relationship between n1 and n2.
When five equal positive charges are uniformly spaced along the x-axis, the force on the next to last charge on the right is directed
A) to the right. B) possibly in the negative y-direction. C) zero. D) possibly in the positive y-direction. E) to the left.