Q1) Suppose you are going to visit your friend and you realize that when she is wearing her glasses, she has to put her book 36cm from her face to be able to read. Then, you tell her that is she is probably due for new glasses. You see her current prescription is + 0.8D. a) Calculate the punctum proximum of your friend's eyes in cm. b) So that she can read comfortably, you prescribe new glasses to her. Calculate the vergence of these glasses in diopter.

3. Figure 2.2 is a photograph of an eyeball with the image of a boy in a doorway. Is the eye here acting as a lens or as a mirror? Explain. 6. A stamp collector uses a converging lens with focal length 28 cm to view a stamp 16 cm in front of the lens. (a)Where is the image located? (b) What is the magnification? Figure 2.1 Problem 2 Figure 2.2 Problem 3

Amber (n = 1.546) is a transparent brown-yellow fossil resin. An insect, trapped and preserved within the amber, appears to be 2.3 cm beneath the surface when viewed directly from above. How far below the surface is the insect actually located? Number i Units

A Moving to another question will save this response. Question 3 Measure the object using the proper number of significant figures. Instrument units are millimeter. m 10 O 8 mm O 8.0 mm O 7.99 mm O 7.90 mm A Moving to another question will save this response. MacBook Air 80 000 000 F2 F3 F4 F5 F6 %23 6. %24 # 3