Question

2.9 The photograph of a house occupies an area of 1.75 cm² on a 35 mm slide. The slide
is projected on to a screen, and the area of the house on the screen is 1.55 m². What
is the linear magnification of the projector-screen arrangement.
.10 State the number of significant figures in the following:​

Answer 1

Answer:

Explanation:Area of the house on the slide = 1.75 cm2

Area of the image of the house formed on the screen = 1.55 m2

= 1.55 × 104 cm2

Arial magnification, ma =  Area of Image / Area of Object = (1.55 / 1.75) x 104

∴Linear magnifications, ml = underroot ma

=$\sqrt{1.55/1.75*10^-4} =94.11$