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Chapter 33: Q. 36 (page 956)
shows the light intensity on a screen behind a double slit. The slit spacing is and the wavelength of the light is . What is the distance from the slits to the screen?
The screen's length from the slits is
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If sunlight shines straight onto a peacock feather, the feather appears bright blue when viewed fromon either side of the incident beam of light. The blue color is due to diffraction from parallel rods of melanin in the feather barbules, as was shown in the photograph on page . Other wavelengths in the incident light are diffracted at different angles, leaving only the blue light to be seen. The average wavelength of blue light is . Assuming this to be the first-order diffraction, what is the spacing of the melanin rods in the feather?
You want to photograph a circular diffraction pattern whose central maximum has a diameter of . You have a helium neon laser and a-diameter pinhole. How far behind the pinhole should you place the screen that鈥檚 to be photographed?
A chemist identifies compounds by identifying bright lines in their spectra. She does so by heating the compounds until they glow, sending the light through a diffraction grating, and measuring the positions of first-order spectral lines on a detector behind the grating. Unfortunately, she has lost the card that gives the specifications of the grating. Fortunately, she has a known compound that she can use to calibrate the grating. She heats the known compound, which emits light at a wavelength of , and observes a spectral line from the center of the diffraction pattern. What are the wavelengths emitted by compounds and that have spectral lines detected at positions and , respectively?
Light from a helium-neon laser passes through a circular aperture and is observed on a screen behind the aperture. The width of the central maximum is. What is the diameter (in mm) of the hole?
FIGURE P33.56 shows the light intensity on a screen behind a single slit. The wavelength of the light is and the slit width is . What is the distance from the slit to the screen?
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