Question

Section 3: Chapters 24 through 26 15. Which of the following statements best describes the optical element hidden by the black bex 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 flat piece of glass. D) The black box must contain a concave mirror. E) The black box must contain a convex mirror. 16. Which of the following wavelengths of light is not visīble to the average human eye? D) 700 nm B) 533 nm C) 644 nm E) 810 nm A) 475 nm 17. Which type of wave is an electromagnetic wave? C) longitudinal D) None of these. B) sound A) transverse 18. For a particular mirror with an object in front of it, the image distance is negative and half the object distance (positive) 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, inverted and smaller than the object. D) It is virtual, inverted and bigger than the object. E) It is real, upright and bigger than the object. 18. Which of the rays labeled in the diagram to the right would likely correspond to visible light that is blue? B) C) D) E) F) G) A)

Answer 1

Question 15

as we can see from the diagram that lines are parallel to each other even after passing the black box so the black box must be a glass piece.

so correct option here is Option C.

Question 16

visible spectrum for human eye is 380 nm to 740 nm.so correct answer is Option D which is 810 nm which is beyond the visible spectrum.

Question 17

transverse wave are electromagnetic wave so correct option A.

feel free to drop comment if you have any doubt.