Collimated red light (656.2816 nm) from a hydrogen discharge lamp falls perpendicularly onto a transmission grating. The beam emerges forming a red line in the second-order spectrum at an angle of 42.00^∘ with the central axis. Compute the number of lines per centimeter the grating must have. Determine the angular location of the blue (486.1327 nm) line in the second-order hydrogen spectrum. | Numerade
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A hydrogen discharge lamp emits light with two prominent wavelengths: 656 nm (red) and 486 nm (blue). The light enters a flint-glass prism perpendicular to one face and then refracts through the hypotenuse back into the air. The angle between these two faces is 35^∘ a. Use Figure 23.29 to estimate to ±0.002 the index of refraction of flint glass at these two wavelengths. b. What is the angle (in degrees) between the red and blue light as it leaves the prism? | Numerade
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Why must the hydrogen vapor lamp be turned on before it gives off light? Because the lamp needs energy in order to emit light. Why is the spectroscope necessary to observe the hydrogen spectrum? Because it separates the different wavelengths of light. Use the colored pencils to color the arrows on the electron transition diagram for H to correspond to the.
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