Several Questions... Figure eight represents a ray light that travels from air i

Question

Several Questions...

Figure eight represents a ray light that travels from air into a lake What will be the speed of the light ray in the water? What is the frequency of the light ray in AIR if its wavelength is 400 nm? Determine the angle of refraction for the ray Light is traveling from air to diamond. Could it ever totally internally reflect? Answer yes the diamond has a lower n than air. no the diamond has a lower n than air yes, the diamond has a higher n than air no the diamond has a higher n than air A glass pane has an = 1.52.degree What is its critical angle? A converging mirror has a focal length of 20 cm. It is used to view a stamp 10 cm away from it. The image you see will be Answer virtual upright magnified all of these Real images are always Answer inverted upright the same size as the object

Explanation / Answer

a) v = c/n = 3E8/1.33=2.26E8 m/s

b) frequency = v/wavelength = 3E8/400E-9=7.5E14 Hz

c) 1 sin(30) = 1.33 sin(theta)

theta = arcsin(sin(30)/1.33)=22.08 degrees

2) no the diamond has higher n than air

3) sin thetac = 1/1.52

theta c = arcsin(1/1.52)41.14

4)1/i + 1/o = 1/f

1/i + 1/10 = 1/20
1/i = 1/20 - 1/10 = -1/20

i = -20
m = -i/o = 20/10 = 2
so virtual upright and magnified
so all fo them

5)
real images means i>0
so inverted

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