In a choir practice room, two parallel walls are 4.10 m apart. The singers stand
ID: 1506801 • Letter: I
Question
In a choir practice room, two parallel walls are 4.10 m apart. The singers stand against the north wall. The organist faces the south wall, sitting 0.680 m away from it. To enable her to see the choir, a flat mirror 0.600 m wide is mounted on the south wall, straight in front of her. What width of the north wall can the organist see? Suggestion: Draw a top-view diagram to justify your answer. m An object is placed 52.5 cm from a concave spherical mirror with focal length of magnitude 15.5 cm. (a) Find the location of the image. cm in front of the mirror (b) What is the magnification of the image? (c) Is the image real or virtual? real virtual (d) Is the image upright or inverted? upright inverted A dedicated sports car enthusiast polishes the inside and outside surfaces of a hubcap that is a thin section of a sphere. When she looks into one side of the hubcap, she sees an image of her face 26.0 cm in back of the hubcap. She then flips the hubcap over and sees another image of her face 10.0 cm in back of the hubcap.Explanation / Answer
7) using 1/f = 1/do + 1/di
(1/15.5) = (1/52.5) + (1/di)
image distance di = 22 cm infront of the mirror
b) magnification is m = -di/do = -22/52.5 = -0.419
Since magnification is negative the formed image is virtual and inverted