In an optical square the angle between the first incident ray and last reflected ray is:
A60°
B120°
C90°
D102°
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
The book in which chain measurements are entered is called:
The distance travelled by a moving vehicle during perception time and brake reaction time is called
Which of the following coupling is used to connect two shafts which have both lateral and angular misalignment ?
A microphone is classified as
M 20 grade of concrete corresponds approximately to