Question

A small object is placed 25.0 cm from a converging lens of focal length 40.0 cm. The object is to the left of the lens. Where is the image? A- 17cm to the right of the lens B- 25cm to the left of the lens C- 17 cm to the left of the lens D-25 cm to the right of the lens E-67cm to the right of the lens F-67 cm to the left of the lens A small object is placed 25 cm to the left of a converging lens of focal length 40 cm (same as question 11). Which statement is true about the image? A- it is real, inverted and large than the object B- it is real, upright and larger than the object C- it is real, inverted and smaller than the object D-it is virtual inverted and larger than the object E- it is virtual upright and larger than the object F- It is virtual inverted smaller than the object A small object is placed 50 cm from a convex mirror producing an upright image which is 0.60 times as high as the object. What is the focal length of the mirror? A- (-19cm) B- 30cm C-(-75) D- (75) E- 19 F-(-30)

Answer 1

u= -25.0 em, Given, for converging lens, f=+40.0cm, +--+ + + + + + tho V=? - 25 4.3 s- & 1 25 11 3 200 22 200 200 3 66.67 67cm v=-67 cm. 2 - From :: correct choice : (F) .67 cm to the left of the lens. above results, 67. magnification, :: True statement about image is. (E) it is virtual upright and larger than the object. mz 2e +2.60 - 25 3- For a convex mirror, U = -50cm, mz-V u ato.60 V=-0.6U = -0.6*(-50) V 2 + 30 cm. mirror formula ť + t = 30 $0 f 50 30 28 1J 1500 f 1500 = 1 / 2 f = 150 2 75 om correct choice is (0) 75 ✓