Q13.
Q14
Q15.
Total internal reflection: (1) either: going
from more dense to less dense media OR wave speed increasing
(2) angle incident to boundary must be greater than the critical angle
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Q16. |
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|
(a) |
37.4 |
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|
|
(b) |
48.7 |
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|
n
= |
1.5 |
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|
|
|
|
Q17 |
19.5 |
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|
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Q18 |
58.98 |
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|
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Q19 |
(a)
(b) 24.4 |
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|
|
Q20 |
1.53 |
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|
Q21 |
18.58 |
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|
|
Q22 |
light is
slowed down thro' water |
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|
sound travels
faster thro' water |
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