Question

A radius 64.0 cm concave spherical mirror is used to project an image on a screen 3.50 m away. (a) calculate the object distance from the mirror. (b) Calculate the magnification of the image. (c) is the image erect or inverted? You want to form an image of a postage stamp double the actual size of the stamp by using a magnifying glass of focal length 30.0 cm. What is the distance of the stamp from the lens?

Answer 1

R = 64cm -R f - 32 cm + As sawn is 3.5m amay Screen 350cm a) Let us be object position $ + y = 7 - 45o the = - 1 1/2 to = 350 32-350 350x32 - 35.22 cm 35.22 cm sis m object distance b) magnification - (=3592) m =- 9.93 c) As im is regative so image is inverted 3 magnifying glass convex lens f = 30 cm we want image size double of object size and there is no constraint on inverted erich m=12 AS uu so

I m2 m-v 야는 2北 V=20 200 뚜 20. Q = -5cm Case II T-su ma k -2 = V -20 =) 2). 30 향키 200 T = 로 29 30 = -YS Cm M So there 2 possible distances 15cm and 45 cm from the lens