A student is investigating the refraction of light by a transparent block. She uses her results to determine a quantity known as the refractive index for the material of the block. The student's ray-trace sheet is shown in Fig. 3.1. ray-trac sheet B • P3 •P4 eye Fig. 3.1

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Chapter1: Units, Trigonometry. And Vectors
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A student is investigating the refraction of light by a transparent block. She uses her results to
determine a quantity known as the refractive index for the material of the block.
The student's ray-trace sheet is shown in Fig. 3.1.
M
ray-trace
sheet
A
B
• P3
•P4
eye
Fig. 3.1
Transcribed Image Text:A student is investigating the refraction of light by a transparent block. She uses her results to determine a quantity known as the refractive index for the material of the block. The student's ray-trace sheet is shown in Fig. 3.1. M ray-trace sheet A B • P3 •P4 eye Fig. 3.1
(c) The student views the images of P, and P, through the block, from the direction indicated by
the eye in Fig. 3.1.
She places two pins P, and P, as shown in Fig. 3.1, so that pins P, and P,. and the images
of P, and P2, all appear exactly one behind the other.
(1) • Draw a line joining P3 and P,. Extend this line until it meets NL.
• Label the point at which this line crosses CD with the letter E, and the point at which it
meets NL with the letter F.
Draw a line joining points N and E.
Measure the length a of line NE.
a =
Measure the length b of line FE.
b = ..
(ii) Calculate a value n for the refractive index, using the equation n= .
b'
n=
(d) Describe two precautions that you would take in order to obtain reliable results in this type of
experiment.
1.
2.
Transcribed Image Text:(c) The student views the images of P, and P, through the block, from the direction indicated by the eye in Fig. 3.1. She places two pins P, and P, as shown in Fig. 3.1, so that pins P, and P,. and the images of P, and P2, all appear exactly one behind the other. (1) • Draw a line joining P3 and P,. Extend this line until it meets NL. • Label the point at which this line crosses CD with the letter E, and the point at which it meets NL with the letter F. Draw a line joining points N and E. Measure the length a of line NE. a = Measure the length b of line FE. b = .. (ii) Calculate a value n for the refractive index, using the equation n= . b' n= (d) Describe two precautions that you would take in order to obtain reliable results in this type of experiment. 1. 2.
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