1) 1. The image of a distant object formed by a concave mirror is obtained at the a) A) Focus b) B) Pole c) C) Center of curvature d) D) Behind the mirror 2) 2. When a concave mirror is used to determine its focal length using a distant object, the image formed is: a) A) Virtual and erect b) B) Real and inverted c) C) Virtual and inverted d) D) Real and erect 3) 3. In the distant object method, the distant object is usually: a) A) A nearby lamp b) B) A tree branch c) C) The Sun or a distant building d) D) A candle flame 4) 4. The focal length of a concave mirror is the distance between the a) A) Pole and Center of Curvature b) B) Pole and Focus c) C) Focus and Center of Curvature d) D) Object and Image 5) 5.While finding the focal length of a concave mirror using a distant object, if the image on the screen is blurred, it means: a) A) The object is not at infinity b) B) The mirror is not concave c) C) The screen is not placed exactly at the focus d) D) The mirror has no focal point 6) 6. When parallel rays of light from a distant object strike a concave mirror, they converge a) A) At infinity b) B) At the focus of the mirror c) C) At the pole of the mirror d) D) At the center of curvature 7) 7. To get a sharp image on the screen in the experiment, the screen should be moved until: a) A) The image becomes brightest and smallest b) B) The image becomes largest and blurred c) C) The image becomes erect and clear d) D) The mirror forms no image 8) 8. The nature of the image formed by a concave mirror when the object is at infinity is: a) A) Real, inverted, and highly diminished b) B) Virtual, erect, and enlarged c) C) Real, erect, and same size d) D) Virtual, inverted, and enlarged 9) 9. If the image of the Sun is formed 15 cm from the pole of a concave mirror, then the focal length of the mirror is: a) A) 7.5 cm b) B) 10 cm c) C) 15 cm d) D) 30 cm 10) 10. The focal length of a concave mirror depends on: a) A) The colour of light used b) B) The curvature of the mirror c) C) The distance of the object d) D) The type of screen used

JKC Experiment 9 : Focal Length of concave mirror Using a Distant Object

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