Electronics and Communication Engineering - Communication Systems - Discussion
Discussion Forum : Communication Systems - Section 3 (Q.No. 37)
37.
A + 1.9 lens has a focal length of 25 mm. The diameter of lens is about
Answer: Option
Explanation:
.
Discussion:
2 comments Page 1 of 1.
Sush said:
8 years ago
Explain the answer in detail.
Sam said:
5 years ago
F= focal length D= diameter.
N= F/D.
D= F/N= 25/1.9 =250/19 =13.1 mm = approx 13.
So, the option is A.
N= F/D.
D= F/N= 25/1.9 =250/19 =13.1 mm = approx 13.
So, the option is A.
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