{"text_format":"2","workbook":"xls","n_sheets":3,"sheets":["Sheet1","Sheet2","Sheet3"],"not_rendered":{"charts":0,"images":0,"macros":1,"external_links":2,"defined_names":4,"comments":0,"pivot_tables":0},"unopened":[],"bounds":{"document_bytes":16777216,"sheet_cells":100000,"run_cost":"one","rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096},"cells_cut":0,"cells_raw":0,"read":"whole","date_system":"1900","formulas":"cached_only"}

{"sheet":"Sheet1","index":0,"n_rows":15,"n_cols":4,"rows_kept":15,"cut":false,"hidden":false,"merged":[],"flags":["formulas_cached_only"]}
["Insert a formula into cell B6 using \"intensity\", \"coefficient\" and \"thickness\" as variable names."]
["Copy or spread the formula to G and B and then down to as many layers as one wants to calculate."]
["\"coefficient\" is the period thickness expressed in number of layers."]
[]
[null,"R","G","B"]
[]
["intensity",1,1,1]
["coefficient",2.05,2.5,3.3]
["thickness"]
[1,0,24,86]
[2,254,167,27]
[3,3,167,235]
[4,249,24,158]
[5,9,255,1]
[6,242,24,180]

{"sheet":"Sheet2","index":1,"n_rows":0,"n_cols":0,"rows_kept":0,"cut":false,"hidden":false,"merged":[],"flags":["formulas_cached_only"]}

{"sheet":"Sheet3","index":2,"n_rows":0,"n_cols":0,"rows_kept":0,"cut":false,"hidden":false,"merged":[],"flags":["formulas_cached_only"]}