Unformatted text preview: 12. A supervisor is sitting at her desk illuminated by a 180 candela source 3 feet above it. She is writing with green ink (reflectance=30%) on a yellow note pad (reflectance=60%). What is the illumination on the note pad? Is that sufficient? If not, what amount of illumination is need? What is the contrast of the writing task? What is the luminance of the notepad? 13. How much ventilation would be recommended for a classroom of area 1,000 ft 2 with 12-foot ceilings? Assume that the class size may reach 40 students....
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- Spring '08
- Photometry, Harshad number, Hour, Dorben Co.