Determine the number of grating lines necessary to resolve the 589.59 nm and 589.00 nm sodium lines in second order.
a. 999 b. 680 c. 500
d. 340 e. 380
Two slits separated by 0.10 mm are illuminated with green light ( = 540 nm). Calculate the distance (in cm) from the central bright-region to the fifth bright band if the screen is 1.0 m away.
a. 2.3 b. 2.5 c. 2.7
d. 2.1 e. 2.0
11. The electric fields arriving at a point P from three coherent sources are described by E1 = E0 sin t, E2 = E0 sin (t + /4) and E3 = E0 sin (t + /2). Assume the resultant field is represented by Ep = ER sin (t + ). The amplitude of the resultant wave at P is
a. E0. b. 1.5E0. c. 1.7E0.
d. 2.7E0. e. 2.9E0.
12. Monochromatic light ( = 500 nm) is incident on a soap bubble (n = 1.40). What is the wavelength of the light (in nm) in the bubble film?
a. 255 b. 500 c. 700
d. 357 e. 422
13. In a Newton’s rings apparatus, find the phase difference (in radians) when an air wedge of 500 nm thickness is illuminated with red light ( = 640 nm).
a. 13 b. 11 c. 9
d. 7 e. 3
If you stand closer to a concave mirror than a distance of one focal length, the image you see is
a. real and inverted. b. real and upright.
c. virtual and inverted. d. virtual and upright.
e. none of the above because you do not get an image.
A light ray is partially reflected and partially refracted at a boundary between two media, the upper one having index of refraction n, the lower one having index of refraction n, as shown in the figure. The reflected ray is perpendicular to the refracted ray when
a. n = n tan incident. b. n = n cot incident. c. n = n .
d. n = n .
. How much electromagnetic energy is contained in each cubic meter near the Earth’s surface if the intensity of sunlight under clear skies is 1000 W/m2?
a. 3.3 10–6 J b. 3.3 J c. 0.003 J
d. 10–4 J e. 3.0 105 J
2. At a distance of 10 km from a radio transmitter, the amplitude of the E-field is 0.20 volts/meter. What is the total power emitted by the radio transmitter?
a. 10 kW b. 67 kW c. 140 kW
d. 245 kW e. 21 kW