Which of the following statements best describes the optical element hidden by t

Question

Which of the following statements best describes the optical element hidden by the black box in the diagram given the behavior of the parallel rays of light incident on it? A) The black box must contain a concave lens. B) The black box must contain a convex lens. C) The black box must contain a concave mirror. D) The black box must contain a convex mirror. E) The black box must contain a plane mirror. Which of the following wavelengths of light is not visible to the average human eye? A) 375 nm B) 433nm C) 544 nm D) 605 nm E) 700 nm Which type of wave is an electromagnetic wave? A) longitudinal B) sound C) transverse D) None of these. For a particular mirror with an object in front of it, the image distance is positive and half the object distance in magnitude. What can be said of the image? A) It is real, upright and smaller than the object. B) It is virtual, upright and smaller than the object. C) It is real, inserted and smaller than the object. D) It is virtual, inserted and bigger than the object. E) It is real, upright and bigger than the object. Which of the rays labeled in the diagram to the right would likely correspond to visible light that is green? A) B) C) D) E) F) G)

Explanation / Answer

3.1)

The rays converge after passing throught convex lens

OPTION(B)

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3.2)

visible wavelength range is 390 nm to 700 nm

OPTION (A)

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3.3)

electromagnetic is transverse wave

OPTION C)

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3.4)

object distance = p

image distance q = p/2

magnification m = -q/p

m = -(p/2)/p

m = -1/2

image is real , inverted and smaller than the object

OPTION(C)

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3.5)

D

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