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User:WalkingRadiance/Physics Optics Wavelength

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A1. Laser light of frequency 1.0 10 15 Hz is fired into a bucket of water. (Inside the water, the laser

has the same frequency as outside.)

A) If the index of refraction of the water is 1.33, find the wavelength of the laser trasmitted *in*

the water. (Warning: this will be different from the wavelength outside the water; think

carefully about what is different inside the water.)

is the wavelength and is the frequency in hertz or inverse seconds and

The answer to A1 is and

The total number of protons and neutrons in Boron-11 is 11. The total number of protons in boron is 5 because boron's atomic number is 5. The total number of protons in boron-11 and a proton is 12 (11+1).

Quantity Symbol Unit Unit Symbol
Wavelength meters m
Index of refraction dimensionless
frequency hertz Hz
angle radians rad
velocity in medium meters per second m/s

The

The two equations are , which is simplified to and

is subtracted from . we now have