Question 5 1 pts You have a concave spherical mirror (the same holds if you had a convex mirror) If the value of q (the distance from the image to the mirror along the principal axis of the mirror) is 0.92m and the distance of p (the distance from the object to the mirror along the principal axis of the mirror) is 3.79m, what is the focal length of the mirror? l' P -| The magnication equation and the sign convention for q imply that real images of real objects are always inverted (if both p and q are positive, m is negative); virtual images of real objects are always upright (if p is positive and q is negative, m is positive). Keeping the signs of p and q straight in your mind is the most challenging aspect of mirrors (and lenses). Fortunately, table 23.2 summarizes when p and q are positive and when they are negative. Note: Do not explicitly include units in your answer (it is understood the unit is meter). Enter only a number. If you do enter a unit, your answer will be counted wrong