• A
• B
• C
• D

• diameter
• focal point
• focal length

• plane mirror
• concave lens
• convex lens
• All of above

• diverging
• concave
• convex
• achromatic
• #### 5.  Yuna is trying to find the magnification value for a magnifying glass. She pulls up a picture on her phone, holds the magnifying glass up to her phone, and finds the height of the image formed by the lens. What other information would she need to collect to be able to calculate the magnification value?

• The height of the original object (the picture displayed on her phone)
• The distance from the lens to the original object (the picture displayed on her phone)
• The distance from the lens to the image formed by the lens
• The diameter of the lens
• #### 6.  The lens seen pictured here

• is a diverging lens that only forms real, upright, reduced images
• is a diverging lens that can only form virtual, upright, reduced images.
• is a converging lens that can form both real and virtual images.
• is a converging lens that can only form real, upright reduced images.
• #### 7.  If​ ​a​ ​virtual​ ​image​ ​is​ ​formed​ ​along​ ​the​ ​principal​ ​axis​ ​10 cm​ ​from​ ​a​ ​concave​ lens ​with​ ​focal​ ​length​ ​15 cm,​ ​what are​ ​the​ ​object’s​ ​distance​ ​from​ ​the​ lens and magnification, respectively?

• do= 6.0 cm; M= 0.60
• do= 6.0 cm; M= 1.67
• do= -30.0 cm; M= -0.33
• do= 30.0 cm; M= 3.00
• #### 8.  A student draws three rays of light from point P through a converging lens. Each point labelled F is a principal focus of the lens. Which of the rays are drawn correctly?

• ray Y only
• ray Z only
• ray X and ray Y
• ray X and ray Z

• 12.9 cm
• 0.08 cm
• 35.0 cm
• 40 cm
• #### 10.  A magnifying glass is used to enlarge a 2-cm tall picture up to a height of 5.5 cm tall. What is the magnification of this lens, and what type of lens would make this image?

• 0.36; convex
• 0.36; concave
• 2.75; convex
• 2.75; concave

• 6 m
• 7 m
• 8 m
• 9 m

• diverging
• concave
• convex
• achromatic
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