Calculate the combined correction for curvature and refraction (in m) for a distance of 2 km.
A
0.269
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
0.045
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
3.14
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
0.135
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is A 0.269 The correction due to the curvature of the earth and the refraction can be combined into one composite correction, i.e., combined correction (C).
C=Cc+Cr
=−0.0785d2+0.0112d2
C=−0.0673d2
Remember
where C is in meters and d is in kilometers Cc is curvature correction
Cr is refraction correction
d = Horizontal distance between two points of the earth surface = 2 km