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1 | |
In an interference pattern, the bright lines are due to constructive interference, and the dark lines are caused by destructive interference. |
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| | A) | True |
| | B) | False |
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2 | |
A diffraction grating deviates red light more than blue light. |
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| | A) | True |
| | B) | False |
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3 | |
In Young's experiment, decreasing the separation of the two slits will also decrease the separation of the interference fringes. |
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| | A) | True |
| | B) | False |
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4 | |
The resolving power of a telescope depends on the diameter of its objective lens and is not a function of the magnification. |
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| | A) | True |
| | B) | False |
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5 | |
First-order images are bright lines, and second-order images are dark lines. |
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| | A) | True |
| | B) | False |
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6 | |
The limit of resolution for two objects occurs when the central maximum of the interference pattern of one object coincides with the first dark fringe of the interference pattern from the other object. |
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| | A) | True |
| | B) | False |
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7 | |
Both transverse and longitudinal waves can be polarized by an appropriate choice of material for the polarizer. |
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| | A) | True |
| | B) | False |
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8 | |
The angular separation θ0 of two distant objects at the limit of resolution is a more accurate measure of resolving power than their linear
separation d0. |
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| | A) | True |
| | B) | False |
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9 | |
The greater the number of lines per inch on a diffraction grating, the greater the angle of deviation for the diffracted light. |
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| | A) | True |
| | B) | False |
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10 | |
A polarizer can be used as an analyzer in studying polarized light. |
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| | A) | True |
| | B) | False |
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11 | |
The resolving power of an instrument is determined by |
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| | A) | magnification |
| | B) | focal length of the objective lens |
| | C) | diameter of the objective lens |
| | D) | none of these |
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12 | |
The main advantage of a grating over Young's apparatus is the |
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| | A) | sharpness of the bright lines |
| | B) | absence of dark fringes |
| | C) | absence of bright fringes |
| | D) | greater deviation of light |
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13 | |
Which of the following demonstrates the transverse nature of light waves? |
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| | A) | Interference |
| | B) | Polarization |
| | C) | Diffraction |
| | D) | Refraction |
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14 | |
A diffraction grating with a spacing of 15,000 lines/in. has a slit separation of |
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| | A) | 6.67 x 10-6 in. |
| | B) | 5.9 x 10-3 cm |
| | C) | 3.81 μm |
| | D) | 1.69 x 10-4 cm |
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15 | |
In Young's experiment, the slit separation in 0.02 mm, and the screen is 1 m away. If the slit is illuminated with light of wavelength 500 nm, the second bright fringe will be displaced from the central fringe by approximately |
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| | A) | 3 cm |
| | B) | 4 cm |
| | C) | 5 cm |
| | D) | 6 cm |
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16 | |
A diffraction grating having 7000 lines/cm is illuminated by light of wavelength 589 nm. The angular separation of the second-order bright fringe is approximately |
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| | A) | 51.2° |
| | B) | 55.5° |
| | C) | 61.5° |
| | D) | 65° |
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17 | |
A parallel beam of light illuminates a diffraction grating with 15,000 lines/in. The first-order image is located 16 cm from the central image of a screen 50 cm from the grating. The wavelength of the light is approximately |
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| | A) | 515 nm |
| | B) | 571 nm |
| | C) | 541 nm |
| | D) | 592 nm |
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18 | |
A 30-in.-diameter optical telescope examines a large skylab orbiting 150 mi above the earth. The minimum separation of two points that can be resolved by the telescope, receiving light of average wavelength 500 nm, is approximately |
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| | A) | 0.56 ft |
| | B) | 0.634 ft |
| | C) | 0.75 ft |
| | D) | 2.67 ft |
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19 | |
In Question 18, the angular resolution is |
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| | A) | 8 x 10-7 rad |
| | B) | 7.2 x 10-7 rad |
| | C) | 8.1 x 10-6 rad |
| | D) | 7.5 x 10-6 rad |
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20 | |
The ability of waves to bend around obstacles in their path is called . |
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21 | |
The minimum separation of two objects that can just be distinguished as separate images by a telescope is a measure of its . |
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22 | |
When two or more waves exist simultaneously in the same medium, the resultant at any point is the sum of the of the composite waves at that point. |
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23 | |
Question 22 represents a statement of the principle. |
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24 | |
The dark lines in Young’s experiment are the result of interference. |
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25 | |
The resolving power of an instrument for use with light of constant wavelength is determined by the of the objective lens. |
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26 | |
An optical device that produces a spectrum as a result of interference of light passing through thousands of parallel slits is called a(n) . |
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