PUZZLE #3331: Spectral Glass Cipher (diff 4)
A glass filter doped with rare-earth elements, 7 columns. Each character absorbs at a specific wavelength on a 5nm grid. Identify absorption dips and read characters in wavelength order.
DATA
| Difficulty |
4
|
| N Cols |
7
|
| Linewidth Nm |
2.5
|
| Spectrum |
[400.0, 1.0], [400.75, 1.0], [401.5, 1.0], [402.26, 0.9905], [403.01, 0.988], [403.76, 1.0], [404.51, 0.9842], [405.26, 1.0], [406.02, 1.0], [406.77, 0.9889], [407.52, 0.9966], [408.27, 1.0], [409.02, 0.9987], [409.77, 0.9799], [410.53, 1.0], [411.28, 1.0], [412.03, 1.0], [412.78, 1.0], [413.53, 0.9891], [414.29, 1.0], [415.04, 1.0], [415.79, 0.9951], [416.54, 0.9999], [417.29, 0.9971], [418.05, 1.0], [418.8, 0.9981], [419.55, 1.0], [420.3, 1.0], [421.05, 1.0], [421.8, 1.0], [422.56, 0.9973], [423.31, 0.9887], [424.06, 0.9939], [424.81, 1.0], [425.56, 1.0], [426.32, 0.9981], [427.07, 0.9846], [427.82, 0.9987], [428.57, 0.979], [429.32, 0.9675], [430.08, 0.9193], [430.83, 0.873], [431.58, 0.7723], [432.33, 0.6868], [433.08, 0.5866], [433.83, 0.5129], [434.59, 0.4499], [435.34, 0.4532], [436.09, 0.4979], [436.84, 0.5958], [437.59, 0.6899], [438.35, 0.7789], [439.1, 0.865], [439.85, 0.9232], [440.6, 0.9481], [441.35, 0.9776], [442.11, 0.9878], [442.86, 0.983], [443.61, 0.9884], [444.36, 0.9599], [445.11, 0.9284], [445.86, 0.8628], [446.62, 0.783], [447.37, 0.6798], [448.12, 0.5908], [448.87, 0.499], [449.62, 0.4513], [450.38, 0.4582], [451.13, 0.5064], [451.88, 0.5815], [452.63, 0.6889], [453.38, 0.773], [454.14, 0.8518], [454.89, 0.9132], [455.64, 0.962], [456.39, 0.9794], [457.14, 0.9985], [457.89, 0.9785], [458.65, 0.9753], [459.4, 0.9465], [460.15, 0.9296], [460.9, 0.856], [461.65, 0.7796], [462.41, 0.6662], [463.16, 0.5782], [463.91, 0.4714], [464.66, 0.394], [465.41, 0.3562], [466.17, 0.3406], [466.92, 0.3413], [467.67, 0.3294], [468.42, 0.3433], [469.17, 0.3395], [469.92, 0.3752], [470.68, 0.4342], [471.43, 0.4996], [472.18, 0.6166], [472.93, 0.7119], [473.68, 0.7896], [474.44, 0.8359], [475.19, 0.8451], [475.94, 0.7989], [476.69, 0.7566], [477.44, 0.6706], [478.2, 0.5785], [478.95, 0.4873], [479.7, 0.4639], [480.45, 0.4595], [481.2, 0.5059], [481.95, 0.5928], [482.71, 0.7065], [483.46, 0.7867], [484.21, 0.88], [484.96, 0.9202], [485.71, 0.976], [486.47, 0.9832], [487.22, 0.9695], [487.97, 0.9787], [488.72, 0.973], [489.47, 0.952], [490.23, 0.9128], [490.98, 0.8407], [491.73, 0.7603], [492.48, 0.679], [493.23, 0.5832], [493.98, 0.4875], [494.74, 0.4422], [495.49, 0.4559], [496.24, 0.5296], [496.99, 0.6023], [497.74, 0.6798], [498.5, 0.7753], [499.25, 0.8377], [500.0, 0.8498], [500.75, 0.8315], [501.5, 0.7743], [502.26, 0.7002], [503.01, 0.5897], [503.76, 0.5073], [504.51, 0.4476], [505.26, 0.4477], [506.02, 0.4948], [506.77, 0.584], [507.52, 0.6743], [508.27, 0.7759], [509.02, 0.8575], [509.77, 0.9042], [510.53, 0.9679], [511.28, 0.9672], [512.03, 0.997], [512.78, 0.9788], [513.53, 1.0], [514.29, 0.9971], [515.04, 1.0], [515.79, 1.0], [516.54, 0.9966], [517.29, 0.9905], [518.05, 1.0], [518.8, 1.0], [519.55, 1.0], [520.3, 0.9851], [521.05, 0.9957], [521.8, 1.0], [522.56, 1.0], [523.31, 1.0], [524.06, 1.0], [524.81, 1.0], [525.56, 1.0], [526.32, 1.0], [527.07, 1.0], [527.82, 1.0], [528.57, 0.9912], [529.32, 1.0], [530.08, 1.0], [530.83, 1.0], [531.58, 1.0], [532.33, 0.991], [533.08, 0.999], [533.83, 0.9755], [534.59, 1.0], [535.34, 1.0], [536.09, 0.9967], [536.84, 1.0], [537.59, 0.9874], [538.35, 1.0], [539.1, 0.9936], [539.85, 1.0], [540.6, 0.9949], [541.35, 0.9866], [542.11, 1.0], [542.86, 0.9887], [543.61, 1.0], [544.36, 1.0], [545.11, 1.0], [545.86, 1.0], [546.62, 1.0], [547.37, 1.0], [548.12, 0.9954], [548.87, 0.9993], [549.62, 0.9923], [550.38, 0.9991], [551.13, 1.0], [551.88, 1.0], [552.63, 1.0], [553.38, 0.9849], [554.14, 1.0], [554.89, 1.0], [555.64, 0.9962], [556.39, 1.0], [557.14, 0.9972], [557.89, 1.0], [558.65, 1.0], [559.4, 1.0], [560.15, 0.9967], [560.9, 1.0], [561.65, 0.9883], [562.41, 1.0], [563.16, 0.9992], [563.91, 0.9863], [564.66, 1.0], [565.41, 1.0], [566.17, 0.9892], [566.92, 1.0], [567.67, 1.0], [568.42, 1.0], [569.17, 0.9951], [569.92, 0.9949], [570.68, 1.0], [571.43, 0.9967], [572.18, 0.9859], [572.93, 1.0], [573.68, 1.0], [574.44, 1.0], [575.19, 1.0], [575.94, 0.9942], [576.69, 0.9831], [577.44, 1.0], [578.2, 1.0], [578.95, 0.9843], [579.7, 1.0], [580.45, 0.9967], [581.2, 1.0], [581.95, 0.9836], [582.71, 0.9994], [583.46, 0.9988], [584.21, 0.9885], [584.96, 0.9995], [585.71, 1.0], [586.47, 0.9964], [587.22, 0.9979], [587.97, 1.0], [588.72, 0.9945], [589.47, 0.998], [590.23, 0.9966], [590.98, 0.9879], [591.73, 0.9943], [592.48, 1.0], [593.23, 1.0], [593.98, 0.9929], [594.74, 1.0], [595.49, 1.0], [596.24, 0.9977], [596.99, 1.0], [597.74, 1.0], [598.5, 0.9817], [599.25, 0.9825], [600.0, 1.0], [600.75, 0.9875], [601.5, 1.0], [602.26, 1.0], [603.01, 1.0], [603.76, 0.9933], [604.51, 0.9948], [605.26, 0.9969], [606.02, 0.9978], [606.77, 1.0], [607.52, 0.9957], [608.27, 0.9883], [609.02, 1.0], [609.77, 1.0], [610.53, 1.0], [611.28, 0.9935], [612.03, 1.0], [612.78, 0.9933], [613.53, 1.0], [614.29, 1.0], [615.04, 0.9937], [615.79, 0.9853], [616.54, 0.9998], [617.29, 1.0], [618.05, 0.9847], [618.8, 0.9881], [619.55, 0.9908], [620.3, 0.9921], [621.05, 0.9963], [621.8, 0.9963], [622.56, 1.0], [623.31, 1.0], [624.06, 1.0], [624.81, 0.9984], [625.56, 1.0], [626.32, 1.0], [627.07, 0.9965], [627.82, 1.0], [628.57, 0.9997], [629.32, 1.0], [630.08, 1.0], [630.83, 0.9916], [631.58, 1.0], [632.33, 1.0], [633.08, 1.0], [633.83, 1.0], [634.59, 1.0], [635.34, 1.0], [636.09, 0.9967], [636.84, 0.9802], [637.59, 0.9835], [638.35, 0.9944], [639.1, 1.0], [639.85, 0.9996], [640.6, 0.9991], [641.35, 0.995], [642.11, 0.9984], [642.86, 0.9946], [643.61, 0.9994], [644.36, 0.9839], [645.11, 0.9956], [645.86, 0.9979], [646.62, 1.0], [647.37, 0.9974], [648.12, 1.0], [648.87, 1.0], [649.62, 1.0], [650.38, 0.9942], [651.13, 0.9958], [651.88, 1.0], [652.63, 0.9822], [653.38, 0.9961], [654.14, 1.0], [654.89, 0.9951], [655.64, 1.0], [656.39, 0.9993], [657.14, 1.0], [657.89, 1.0], [658.65, 0.9869], [659.4, 0.9968], [660.15, 1.0], [660.9, 1.0], [661.65, 1.0], [662.41, 1.0], [663.16, 1.0], [663.91, 1.0], [664.66, 0.9915], [665.41, 1.0], [666.17, 0.9957], [666.92, 1.0], [667.67, 1.0], [668.42, 0.993], [669.17, 0.9875], [669.92, 0.9872], [670.68, 1.0], [671.43, 0.9879], [672.18, 1.0], [672.93, 1.0], [673.68, 1.0], [674.44, 0.9936], [675.19, 0.9861], [675.94, 0.9935], [676.69, 0.9919], [677.44, 0.9955], [678.2, 1.0], [678.95, 0.9872], [679.7, 1.0], [680.45, 0.9933], [681.2, 1.0], [681.95, 0.9956], [682.71, 0.9978], [683.46, 1.0], [684.21, 1.0], [684.96, 0.9978], [685.71, 1.0], [686.47, 1.0], [687.22, 1.0], [687.97, 1.0], [688.72, 0.9937], [689.47, 1.0], [690.23, 0.9915], [690.98, 1.0], [691.73, 1.0], [692.48, 0.9804], [693.23, 1.0], [693.98, 0.996], [694.74, 0.9851], [695.49, 0.9942], [696.24, 0.9974], [696.99, 0.9929], [697.74, 0.9977], [698.5, 0.9973], [699.25, 0.9937], [700.0, 1.0]
|
| Detected Dips |
[434.9322, 0.4499], [449.9002, 0.4513], [466.5174, 0.3406], [468.8672, 0.3395], [480.14, 0.4595], [494.9435, 0.4422], [504.8837, 0.4476]
|
| Grid Nm |
{
"base": 410.0,
"step": 5.0,
"n_positions": 36
}
|
| Reference |
{
"A": 410.0,
"B": 415.0,
"C": 420.0,
"D": 425.0,
"E": 430.0,
"F": 435.0,
"G": 440.0,
"H": 445.0,
"I": 450.0,
"J": 455.0,
"K": 460.0,
"L": 465.0,
"M": 470.0,
"N": 475.0,
"O": 480.0,
"P": 485.0,
"Q": 490.0,
"R": 495.0,
"S": 500.0,
"T": 505.0,
"U": 510.0,
"V": 515.0,
"W": 520.0,
"X": 525.0,
"Y": 530.0,
"Z": 535.0,
"0": 540.0,
"1": 545.0,
"2": 550.0,
"3": 555.0,
"4": 560.0,
"5": 565.0,
"6": 570.0,
"7": 575.0,
"8": 580.0,
"9": 585.0
}
|
| Hint |
Spectral absorption lines in doped glass filter. Match observed dips to the reference wavelength-to-character table. Wavelength grid: 410 nm base, 5.0 nm step per character.
|
| Answer Format |
single lowercase letter
|
author's note: Pool fill: spectral-glass diff 4
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