Find the Critical Angle for Two Objects 1 Meter Apart $5 \times 10 ^ { - 7 }$

Multiple Choice

Find the critical angle for two objects 1 meter apart when viewed using 500-nm light (assume a rectangular aperture) :

A) $5 \times 10 ^ { - 7 }$ radians
B) $6 \times 10 ^ { - 5 }$ radians
C) $9 \times 10 ^ { - 6 }$ radians
D) $7 \times 10 ^ { - 6 }$ radians