Can eyes with vision be seen clearly?
(A) Nearby objects
(B) Big items
(C) distant objects
(D) None of these
In the human eye?
(A) In the human eye?
(B) convex mirror
(C) convex lens
(D) concave mirror
What is the approximate time difference between an actual sunset and a virtual sunset?
(A) 2 minutes
(B) 1 minute
(C) 4 minutes
(D) 3 minutes
As a result, the Sun appears to be raised above the horizon and we are able to see the Sun 2 minutes before the actual sunrise. Same phenomenon occurs during sunset, i.e., we can see the Sun 2 minutes after the actual sunset. Thus, the time difference between actual sunset and the apparent sunset is about 2 minutes.
What does the color of the sky look like when traveling by air in the sky at high altitude?
(A) Red
(B) Black
(C) Yellow
(D) Blue
What is the unit of magnetic field?
(A) Newton
(B) Tesla
(C) Ampere
(D) meter
Which of the person with long vision defect has glasses?
(A) concave lens
(B) Bifocal lens
(C) convex lens
(D) cylindrical lens
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