Looking straight down onto water (90 degrees to the surface), a light ray coming

Question

Looking straight down onto water (90 degrees to the surface), a light ray coming out of the water straight toward you is refracted

Away from the vertical

Toward the vertical

Not at all

At the critical angle

Red light of wavelength 750 nm in vacuum enters crown glass (n=1.55). The wavelength and color of light inside the glass is now

480 nm; red

1162 nm; infrared

480 nm; bluegreen

240 nm; ultraviolet

Snell's law describes

Dispersion

Magnification

Refraction

Reflection

Away from the vertical

Toward the vertical

Not at all

At the critical angle

Explanation / Answer

first

Toward the vertical

second

480 nm; bluegreen

third

Refraction

Toward the vertical

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