β = | √L x (Vo)2 |
- where:
- An is the number of servings of alcohol
- S is the smokiness of the area on a scale of 0 - 10
- L is the lighting level of the area, measured in candelas per square meter, in which 150 is normal room lightning
- Vo is Snellen visual acuity, in which 6/6 is normal and 6/12 is the lower limit at which someone is able to drive
- d is the distance between the observer and the observed, measured in meters
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