PUZZLE #4209: Spectral Glass Cipher (diff 2)
A glass filter doped with rare-earth elements, 5 columns. Each character absorbs at a specific wavelength on a 5nm grid. Identify absorption dips and read characters in wavelength order.
DATA
| Difficulty |
2
|
| N Cols |
5
|
| Linewidth Nm |
2.0
|
| Spectrum |
[400.0, 1.0], [400.75, 1.0], [401.5, 1.0], [402.26, 1.0], [403.01, 1.0], [403.76, 1.0], [404.51, 1.0], [405.26, 1.0], [406.02, 1.0], [406.77, 1.0], [407.52, 1.0], [408.27, 1.0], [409.02, 1.0], [409.77, 1.0], [410.53, 1.0], [411.28, 1.0], [412.03, 1.0], [412.78, 1.0], [413.53, 1.0], [414.29, 1.0], [415.04, 1.0], [415.79, 1.0], [416.54, 0.9999], [417.29, 0.9996], [418.05, 0.9986], [418.8, 0.9951], [419.55, 0.9854], [420.3, 0.9621], [421.05, 0.9146], [421.8, 0.833], [422.56, 0.7143], [423.31, 0.5779], [424.06, 0.4555], [424.81, 0.382], [425.56, 0.372], [426.32, 0.407], [427.07, 0.4436], [427.82, 0.4467], [428.57, 0.4134], [429.32, 0.3755], [430.08, 0.3766], [430.83, 0.4409], [431.58, 0.5582], [432.33, 0.6949], [433.08, 0.8165], [433.83, 0.9041], [434.59, 0.9569], [435.34, 0.983], [436.09, 0.9942], [436.84, 0.9983], [437.59, 0.9996], [438.35, 0.9999], [439.1, 1.0], [439.85, 1.0], [440.6, 1.0], [441.35, 0.9999], [442.11, 0.9997], [442.86, 0.999], [443.61, 0.9964], [444.36, 0.9887], [445.11, 0.9698], [445.86, 0.9296], [446.62, 0.8561], [447.37, 0.7473], [448.12, 0.6143], [448.87, 0.4885], [449.62, 0.4107], [450.38, 0.4107], [451.13, 0.4885], [451.88, 0.6143], [452.63, 0.7473], [453.38, 0.8561], [454.14, 0.9296], [454.89, 0.9698], [455.64, 0.9887], [456.39, 0.9964], [457.14, 0.999], [457.89, 0.9997], [458.65, 0.9999], [459.4, 1.0], [460.15, 1.0], [460.9, 1.0], [461.65, 1.0], [462.41, 1.0], [463.16, 1.0], [463.91, 1.0], [464.66, 1.0], [465.41, 1.0], [466.17, 1.0], [466.92, 1.0], [467.67, 1.0], [468.42, 1.0], [469.17, 1.0], [469.92, 1.0], [470.68, 1.0], [471.43, 1.0], [472.18, 1.0], [472.93, 1.0], [473.68, 1.0], [474.44, 1.0], [475.19, 1.0], [475.94, 1.0], [476.69, 1.0], [477.44, 1.0], [478.2, 1.0], [478.95, 1.0], [479.7, 1.0], [480.45, 1.0], [481.2, 1.0], [481.95, 1.0], [482.71, 1.0], [483.46, 1.0], [484.21, 1.0], [484.96, 1.0], [485.71, 1.0], [486.47, 1.0], [487.22, 1.0], [487.97, 1.0], [488.72, 1.0], [489.47, 1.0], [490.23, 1.0], [490.98, 1.0], [491.73, 1.0], [492.48, 1.0], [493.23, 1.0], [493.98, 1.0], [494.74, 1.0], [495.49, 1.0], [496.24, 1.0], [496.99, 0.9998], [497.74, 0.9992], [498.5, 0.9969], [499.25, 0.9904], [500.0, 0.9736], [500.75, 0.9373], [501.5, 0.8702], [502.26, 0.7653], [503.01, 0.6343], [503.76, 0.5049], [504.51, 0.4177], [505.26, 0.405], [506.02, 0.4732], [506.77, 0.5944], [507.52, 0.7287], [508.27, 0.8424], [509.02, 0.9204], [509.77, 0.9651], [510.53, 0.9869], [511.28, 0.9957], [512.03, 0.9988], [512.78, 0.9997], [513.53, 0.9999], [514.29, 1.0], [515.04, 1.0], [515.79, 1.0], [516.54, 1.0], [517.29, 1.0], [518.05, 1.0], [518.8, 1.0], [519.55, 1.0], [520.3, 1.0], [521.05, 1.0], [521.8, 0.9999], [522.56, 0.9994], [523.31, 0.9978], [524.06, 0.9927], [524.81, 0.9793], [525.56, 0.949], [526.32, 0.8896], [527.07, 0.7948], [527.82, 0.6687], [528.57, 0.5353], [529.32, 0.4337], [530.08, 0.4005], [530.83, 0.4495], [531.58, 0.5608], [532.33, 0.6956], [533.08, 0.8167], [533.83, 0.9041], [534.59, 0.9569], [535.34, 0.983], [536.09, 0.9942], [536.84, 0.9983], [537.59, 0.9996], [538.35, 0.9999], [539.1, 1.0], [539.85, 1.0], [540.6, 1.0], [541.35, 1.0], [542.11, 1.0], [542.86, 1.0], [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, 1.0], [548.87, 1.0], [549.62, 1.0], [550.38, 1.0], [551.13, 1.0], [551.88, 1.0], [552.63, 1.0], [553.38, 1.0], [554.14, 1.0], [554.89, 1.0], [555.64, 1.0], [556.39, 1.0], [557.14, 1.0], [557.89, 1.0], [558.65, 1.0], [559.4, 1.0], [560.15, 1.0], [560.9, 1.0], [561.65, 1.0], [562.41, 1.0], [563.16, 1.0], [563.91, 1.0], [564.66, 1.0], [565.41, 1.0], [566.17, 1.0], [566.92, 1.0], [567.67, 1.0], [568.42, 1.0], [569.17, 1.0], [569.92, 1.0], [570.68, 1.0], [571.43, 1.0], [572.18, 1.0], [572.93, 1.0], [573.68, 1.0], [574.44, 1.0], [575.19, 1.0], [575.94, 1.0], [576.69, 1.0], [577.44, 1.0], [578.2, 1.0], [578.95, 1.0], [579.7, 1.0], [580.45, 1.0], [581.2, 1.0], [581.95, 1.0], [582.71, 1.0], [583.46, 1.0], [584.21, 1.0], [584.96, 1.0], [585.71, 1.0], [586.47, 1.0], [587.22, 1.0], [587.97, 1.0], [588.72, 1.0], [589.47, 1.0], [590.23, 1.0], [590.98, 1.0], [591.73, 1.0], [592.48, 1.0], [593.23, 1.0], [593.98, 1.0], [594.74, 1.0], [595.49, 1.0], [596.24, 1.0], [596.99, 1.0], [597.74, 1.0], [598.5, 1.0], [599.25, 1.0], [600.0, 1.0], [600.75, 1.0], [601.5, 1.0], [602.26, 1.0], [603.01, 1.0], [603.76, 1.0], [604.51, 1.0], [605.26, 1.0], [606.02, 1.0], [606.77, 1.0], [607.52, 1.0], [608.27, 1.0], [609.02, 1.0], [609.77, 1.0], [610.53, 1.0], [611.28, 1.0], [612.03, 1.0], [612.78, 1.0], [613.53, 1.0], [614.29, 1.0], [615.04, 1.0], [615.79, 1.0], [616.54, 1.0], [617.29, 1.0], [618.05, 1.0], [618.8, 1.0], [619.55, 1.0], [620.3, 1.0], [621.05, 1.0], [621.8, 1.0], [622.56, 1.0], [623.31, 1.0], [624.06, 1.0], [624.81, 1.0], [625.56, 1.0], [626.32, 1.0], [627.07, 1.0], [627.82, 1.0], [628.57, 1.0], [629.32, 1.0], [630.08, 1.0], [630.83, 1.0], [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, 1.0], [636.84, 1.0], [637.59, 1.0], [638.35, 1.0], [639.1, 1.0], [639.85, 1.0], [640.6, 1.0], [641.35, 1.0], [642.11, 1.0], [642.86, 1.0], [643.61, 1.0], [644.36, 1.0], [645.11, 1.0], [645.86, 1.0], [646.62, 1.0], [647.37, 1.0], [648.12, 1.0], [648.87, 1.0], [649.62, 1.0], [650.38, 1.0], [651.13, 1.0], [651.88, 1.0], [652.63, 1.0], [653.38, 1.0], [654.14, 1.0], [654.89, 1.0], [655.64, 1.0], [656.39, 1.0], [657.14, 1.0], [657.89, 1.0], [658.65, 1.0], [659.4, 1.0], [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, 1.0], [665.41, 1.0], [666.17, 1.0], [666.92, 1.0], [667.67, 1.0], [668.42, 1.0], [669.17, 1.0], [669.92, 1.0], [670.68, 1.0], [671.43, 1.0], [672.18, 1.0], [672.93, 1.0], [673.68, 1.0], [674.44, 1.0], [675.19, 1.0], [675.94, 1.0], [676.69, 1.0], [677.44, 1.0], [678.2, 1.0], [678.95, 1.0], [679.7, 1.0], [680.45, 1.0], [681.2, 1.0], [681.95, 1.0], [682.71, 1.0], [683.46, 1.0], [684.21, 1.0], [684.96, 1.0], [685.71, 1.0], [686.47, 1.0], [687.22, 1.0], [687.97, 1.0], [688.72, 1.0], [689.47, 1.0], [690.23, 1.0], [690.98, 1.0], [691.73, 1.0], [692.48, 1.0], [693.23, 1.0], [693.98, 1.0], [694.74, 1.0], [695.49, 1.0], [696.24, 1.0], [696.99, 1.0], [697.74, 1.0], [698.5, 1.0], [699.25, 1.0], [700.0, 1.0]
|
| Detected Dips |
[425.3517, 0.372], [429.6738, 0.3755], [450.0, 0.4107], [505.0027, 0.405], [530.007, 0.4005]
|
| 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 2
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