Question

If my aircraft has luminance of 10 unit and is designed to operate in background which has luminance of 8 unit then, what will be the approximate value of contrast?

(a) 0.25 unit

(b) 1.25

(c) 5.25unit

(d) 5.26

The question was asked during an online interview.

My question is from Configuration Layout Considerations topic in portion Configuration Layout Considerations of Aircraft Design

Answer 1

Correct option is (a) 0.25 unit

Explanation: Given, luminance of A/C L1=10unit, luminance of background L2 = 8unit.

Approximate contras value C = |L1-L2|/L2 = |10-8|/8 = 2/8 = 0.25 unit.