Just need the answers. No explanation needed. Thanks. Due by 11p.m. CST
1) What is the angular separation of two spectral lines of wavelengths 497 nm and 25 1 nm formed in the third order with a diffracting grating having 587 lines per millimeter? A) 34.80 B) 24.80 C) 41.3 D) 29.4 E) 4.210 2) A single slit (slit width a) diffraction pattern with light of wavelength 2, shows a central maximum with a width W . A second single slit setup (slit width a2) for wavelength 22 shows first dark fringe at a distance Y from 0 = 0 . If the slit to screen distance is the same, Which of the following is true ? A) 21/2= a/a2 B) 21/2 =2W ajda2 /Y C) 2a2 Y/2= a, W/2/2, D) X1/2 = a1Y/2a2W E) all of the above F) none of the above 3) Two pure tones are sounded together and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is increased? A) It increases. B) It decreases. C) It does not change. D) It could either increase or decrease. 4) In double slit experiment, a point on the screen will show a dark band if the difference in path travelled between light (of wavelength 2) from one slit over the path travelled from the other slit is A) non-zero B) integer multiple of a C) only odd integer multiple of 2 D) only odd integer multiple of ()2) E) very large 5) Colors of a soap bubble are due to A) Two slit interference B) single slit diffraction C ) Huygen's principle D) colors added in the soap E) thin film interference 6) A guitar string is being tuned against a standard tuning meter by listening to beats. If the string pitch is higher than the standard meter, what needs to be done to bring the string close to the tune from the tuning meter? A) Replace the string with a standard string only and make the beats stronger in loudness B) Tighten the string on the guitar till beats disappear C) Loosen the string on the guitar till beats appear stronger D) Reduce the tension of the string and listen for beat frequency to decrease E) Tighten the string so that the wavelength on the string matches the one from tuning meter 7) Which of the following is diffraction of light? A) a ray of light restricted to oscillate in a plane B) bending of light around obstacles C) light in a fiber optics cable D) bending of light when medium changes E) bouncing of light by a mirror 8) The lowest tone to resonate in a pipe of length L that is closed at one end but open at the other end is 200 Hz. Which one of the following frequencies will not resonate in that pipe? A) 200 Hz B) 400 Hz C) 600 Hz D) 1000 Hz E) 1400 Hz 9) At most, how many bright fringes can be formed on one side of the central bright fringe (not counting the central bright fringe) when light of 600 nm falls on a pair of slits that are 6.77 um apart? A) 8 B) 9 C) 10 D) 11 E) 12 10) Two beams of coherent light start out at the same point in phase and travel different paths to arrive at point P. If the maximum destructive interference is to occur at point P, the two beams must travel paths that differ by A) a whole number of wavelengths. B) an odd number of half-wavelengths. C) a whole number of half-wavelengths
