Answer:
one
Step-by-step explanation:
I think, there were 4 lines and the two lines are reaching each other
Answer:
Its equal to 1
Step-by-step explanation:
Answer:
more than 7
Step-by-step explanation:
4+3 = 7
)sorry if i was wrong(
Answer:
7d+11
Step-by-step explanation:
Pretty much just addition.
3d+4d+2+9
(3d+2)+(4d+9) = 7d+11.
Answer:
Optical axis
Step-by-step explanation:
Optical axis is the rotational symmetry axis of the surfaces.
A line with a certain degree of rotational symmetry is called as the optical axis in an optical system.
It is the straight line that passes through the geometric center of the lens and joins two curvature centers of its surfaces.
It is also called as the principal axis.
