Light is a form of energy measured based on the brightness seen by the human eye. units of light are lumen second, lumen (= candela steradians ), candela (= lumen per steradian), candela per square metre, lux (= lumen per square metre), lumen per square metre, lux second, lumen second per cubic , metre, lumen per watt, lumen per watt.
|
|
Pascal (Pa) |
Bar (bar) |
Technical atmosphere (at) |
Standard atmosphere (atm) |
Torr (Torr) |
Pound per square inch (lbf/in2) |
|
1 Pa |
≡ 1 N / m 2 |
10 −5 |
1.0197×10 −5 |
9.8692×10 −6 |
7.5006×10 −3 |
0.000 145 037 737 730 |
|
1 bar |
105 |
≡ 100 kPa≡ 106 dyn/cm2 |
1.0197 |
0.98692 |
750.06 |
14.503 773 773 022 |
|
1 at |
98066.5 |
0.980665 |
≡ 1 kgf /cm 2 |
0.967 841 105 354 1 |
735.559 240 1 |
14.223 343 307 120 3 |
|
1 atm |
≡ 101325 |
≡ 1.01325 |
1.0332 |
1 |
760 |
14.695 948 775 514 2 |
|
1 Torr |
133.322 368 421 |
0.001 333 224 |
0.001 359 51 |
1/760 ≈ 0.001 315 789 |
1 Torr≈ 1 mmHg |
0.019 336 775 |
|
1 lbf/in 2 |
6894.757 293 168 |
0.068 947 573 |
0.070 306 958 |
0.068 045 964 |
51.714 932 572 |
≡ 1 /in 2 |
|