1. The speed of light in a particular type of glass is 1.39 108 m/s. What is the
ID: 1363304 • Letter: 1
Question
1. The speed of light in a particular type of glass is 1.39 108 m/s. What is the index of refraction of the glass?
2. An object is placed 28 cm from a convex spherical mirror with a focal length of 21 cm. Estimate where the image is located.
_____cm
3. A reflecting, spherical Christmas tree ornament has a diameter of 9.0 cm. A child looks at the ornament from a distance of 27 cm. Describe the image she sees.
Where is the image located?
_____cm
4. An object is placed 32 cm in front of a converging lens with a focal length of 16 cm.
A) Draw a ray diagram.
B) Estimate the image distance.
5. A spherical concave lens has a focal length of 35 cm, and an object is placed 20 cm from the lens.
A) Draw a ray diagram.
B) Estimate the image distance.
6. An object is placed in front of a converging lens at an object distance of twice the focal length of the lens. Sketch a ray diagram and compare the image and object distances. Repeat this with two more ray diagrams, using different focal lengths and still making the object distance twice the focal length. Can you draw any conclusions by comparing the object distance and the image distance?
Di = ______ f
Explanation / Answer
given,
speed of light in medium = 1.39* 10^8 m/s
refractive index = speed of light in vaccum / speed of light in medium
refractive index = 3 * 10^8 / 1.39 * 10^8
refractive index of the glass = 2.158
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