- If you want to know something about the GRE subject test in physics then chances are you will find it in here.
- If something about the physics GRE it isn't already discussed in here then please put it in here.
1 post • Page 1 of 1
A playing field 250ft by 400ft is to have an average illumination at night of 30ft. How many 4000cd lamps are needed if reflectors are used that enable 40 percent of their luminous flux to reach the field?