Question

Sam holds a lit match in front of a lens (f = 25.0 cm). The distance between the match and the lens is s_o = 37.5 cm. Pick the selection that describes the characteristics of the image from the match. real and upside down real and erect virtual and upside down virtual and erect What is the value of the image distance? If the flame is actually 1.500 cm tall, how tall is the image of the flame? (Enter your answer as a positive number.)

Answer 1

(a) real ans upside down

(b) 1/f = 1/v - 1/u

1/25 = 1/v + 1/37.5

image distance v = 75 cm

(c) m = h₂/h₁ = v/u

h₂ = 1.5*75/37.5 = 3 cm

h₂ = 3 cm