Question

Range of light intensity levels to which the human eye can adapt (in Log of Intensity-mL)

(a) 10^-6 to 10^-4

(b) 10^4 to 10^6

(c) 10^-6 to 10^4

(d) 10^-5 to 10^5

This question was addressed to me in examination.

My doubt stems from Elements of Visual Perception in section Image Restoration and Reconstruction of Digital Image Processing

Answer 1

Right choice is (c) 10^-6 to 10^4

Easy explanation: Range of light intensity to which human eye can adapt is enormous

          and about the order 10^10 from 10^-6 to 10^4.