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secondary 3 | A Maths
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How to find r this is a physics qn sryyyy
Date Posted: 4 years ago
Views: 215
Data is not enough. I cannot ascertain that the pencil marking drawn is the correct line.
If it is a correct line, just measure the acute angle between the line and the dotted line for the glass section.
Otherwise, values need to be provided for the refractive index of this glass (for example, n = 1.33).
If it is a correct line, just measure the acute angle between the line and the dotted line for the glass section.
Otherwise, values need to be provided for the refractive index of this glass (for example, n = 1.33).
1st, there is no enuh info for the refractive indices of water & glass. Are these given by ur teacher?
2nd, this qn involves the topic of relative refractive index betw. 2 different media, not incl. vacuum/air.
Hv u been taught relative refractive index?
Fyi, if u r studying for O lvl, relative refractive index is not in the syllabus.
.
2nd, this qn involves the topic of relative refractive index betw. 2 different media, not incl. vacuum/air.
Hv u been taught relative refractive index?
Fyi, if u r studying for O lvl, relative refractive index is not in the syllabus.
.
See 1 Answer
Refractive index of water at 20 deg C, w = 1.33
Refractive index of typical crown glass, g = 1.52
By Snell’s Law,
w sin i = g sin r
sin r = (w/g) * sin i
r = arcsin [(w/g) * sin i]
= 42.8 degree (to 1 d.p.)
Refractive index of typical crown glass, g = 1.52
By Snell’s Law,
w sin i = g sin r
sin r = (w/g) * sin i
r = arcsin [(w/g) * sin i]
= 42.8 degree (to 1 d.p.)
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