Table:
Some representative refractive indices

Material
λ (nm)
n
Ref.

Vacuum

1 (by definition)

Air at STP

1.000277

Gases at 0 °C and 1 atm

Air
589.29
1.000293
[1]

Carbon dioxide
589.29
1.00045
[2]

[3]
[4]

Helium
589.29
1.000036
[1]

Hydrogen
589.29
1.000132
[1]

Liquids at 20 °C

Arsenic trisulfide and sulfur in methylene iodide

1.9
[5]

Benzene
589.29
1.501
[1]

Carbon disulfide
589.29
1.628
[1]

Carbon tetrachloride
589.29
1.461
[1]

Ethyl alcohol (ethanol)
589.29
1.361
[1]

Silicone oil

1.336-1.582
[6]

Water
589.29
1.3330
[1]

10% Glucose solution in water
589.29
1.3477
[7]

20% Glucose solution in water
589.29
1.3635
[7]

60% Glucose solution in water
589.29
1.4394
[7]

Solids at room temperature

Titanium dioxide (Rutile phase )
589.29
2.496
[8]

Diamond
589.29
2.419
[1]

Strontium titanate
589.29
2.41

Amber
589.29
1.55
[1]

Fused silica (also called Fused Quartz)
589.29
1.458
[1]

Sodium chloride
589.29
1.544
[9]

Other materials

Liquid helium

1.025

Water ice

1.31

Cornea (human)

1.373/1.380/1.401
[10]

Lens (human)

1.386 - 1.406

Acetone

1.36

Ethanol

1.36

Glycerol

1.4729

Bromine

1.661

Teflon AF

1.315
[11]

Teflon

1.35 - 1.38

Cytop

1.34
[12]

Sylgard 184 (Polydimethylsiloxane)

1.4118
[13]

PLA

1.46
[14]

Acrylic glass

1.490 - 1.492

Polycarbonate

1.584 - 1.586

PMMA

1.4893 - 1.4899

PETg

1.57

PET

1.5750

Crown glass (pure)

1.50 - 1.54

Flint glass (pure)

1.60 - 1.62

Crown glass (impure)

1.485 - 1.755

Flint glass (impure)

1.523 - 1.925

Pyrex (a borosilicate glass)

1.470
[15]

Cryolite

1.338

Rock salt

1.516

Sapphire

1.762–1.778

Sugar Solution, 25%

1.3723
[16]

Sugar Solution, 50%

1.4200
[16]

Sugar Solution, 75%

1.4774
[16]

Cubic zirconia

2.15 - 2.18

Potassium Niobate (KNbO3)

2.28

Silicon carbide

2.65 - 2.69

Cinnabar (Mercury sulfide)

3.02

Gallium(III) phosphide

3.5

Gallium(III) arsenide

3.927

Zinc Oxide
390
2.4

Germanium

4.01

Silicon
590
3.962
[17]

Considerding the provided table image, extract the cells' values in the following postions:
the 19th row and the 2nd column
the 49th row and the 1st column
the 6th row and the 3rd column
the 26th row and the 3rd column
the 59th row and the 1st column
the 39th row and the 1st column
the 16th row and the 3rd column
the 2nd row and the 1st column

Provide the value of all target cells in the JSON structure, using the format {"row_id":"m", "column_id":"n", "cell_value":"<Corresponding Cell Value>"}.

The target cell values are as follows:
{"row_id":"19", "column_id":"2", "cell_value":"589.29"}
{"row_id":"49", "column_id":"1", "cell_value":"Sapphire"}
{"row_id":"6", "column_id":"3", "cell_value":"1.000036"}
{"row_id":"26", "column_id":"3", "cell_value":"1.373/1.380/1.401"}
{"row_id":"59", "column_id":"1", "cell_value":"Zinc Oxide"}
{"row_id":"39", "column_id":"1", "cell_value":"PMMA"}
{"row_id":"16", "column_id":"3", "cell_value":"1.3635"}
{"row_id":"2", "column_id":"1", "cell_value":"Vacuum"}