Light - Study Mode

[#21] Consider the following statements. 1. If magenta and yellow coloured circles intersect, the intersected area will have a red colour. 2. If cyan and magenta coloured circles intersect, the intersected area will have a blue colour. Which of the statements given above is/are correct?
Correct Answer

(C) Both 1 and 2

[#22] Which of the following medium has the lowest refractive index?
Correct Answer

(C) Air

[#23] A lens has a power of + 2.0D. The type of lens and its focal length will be . . . . . . . .
Correct Answer

(D) convex, 0.5 m

[#24] Which type of mirror is used by dentists to see large image of patients' teeth?
Correct Answer

(C) Concave mirror

[#25] What is viewed through an electron microscope?
Correct Answer

(B) Structure of bacteria and viruses