Assertion: reflecting telescope | /r/HasProperty | equivalent
Facets:
value: to an unobstructed instrument
type: OTHER
value: in these frequencies
type: OTHER
Source sentences:
text: It appears that in these frequencies a reflector with an obstruction of 33 % is equivalent to an unobstructed instrument whose diameter is 33 % less (170 mm for 250 mm).
text: A reflector with an obstruction of 20 % is equivalent to an unobstructed instrument whose diameter is 15 % less (210 mm for 250 mm).