BIO The Largest Eye The colossal squid ( Mesonychoteuthis hamittoni ) has the largest eyes documented in the animal kingdom at least 27 cm in diameter The eyes are large in order to see in dim light but they also have terrific resolution If the squid’s eyes are free of defects find the maximum distance at which the squid could distinguish a pair of lights on a ship that are separated by 1.8 m. Assume 555-nm light a pupil diameter of 11 cm and an average index of refraction for the eye of 1.36.
BIO The Largest Eye The colossal squid ( Mesonychoteuthis hamittoni ) has the largest eyes documented in the animal kingdom at least 27 cm in diameter The eyes are large in order to see in dim light but they also have terrific resolution If the squid’s eyes are free of defects find the maximum distance at which the squid could distinguish a pair of lights on a ship that are separated by 1.8 m. Assume 555-nm light a pupil diameter of 11 cm and an average index of refraction for the eye of 1.36.
BIO The Largest Eye The colossal squid (Mesonychoteuthis hamittoni) has the largest eyes documented in the animal kingdom at least 27 cm in diameter The eyes are large in order to see in dim light but they also have terrific resolution If the squid’s eyes are free of defects find the maximum distance at which the squid could distinguish a pair of lights on a ship that are separated by 1.8 m. Assume 555-nm light a pupil diameter of 11 cm and an average index of refraction for the eye of 1.36.
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Question 1:
A scientist notices that an oil slick floating on water when
viewed from above has many different colors reflecting off
the surface, making it look rainbow-like (an effect known as
iridescence). She aims a spectrometer at a particular spot and
measures the wavelength to be 750 nm (in air). The index of
refraction of water is 1.33.
a) The index of refraction of the oil is 1.20. What is the
minimum thickness t of the oil slick at that spot?
b) Suppose the oil had an index of refraction of 1.50. What
would the minimum thickness t be now?
c) Now assume that the oil had a thickness of 200 nm and
an index of refraction of 1.5. A diver swimming
underneath the oil slick is looking at the same spot as the
scientist with the spectrometer. What is the longest
wavelength Awater of the light in water that is transmitted
most easily to the diver?
Question 2:
A very thin oil film (n=1.25)…
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The width of a telescope aperture is important because it determines what you will be able to resolve.
(a) You are out stargazing with your 11.6-cm telescope. You point your telescope at an interesting formation in the sky,
which you think is a binary star system. A binary star system consists of two stars in orbit around each other. You guess
that the average wavelength coming from the stars is 536 nm. What is the minimum angular separation between the two
stars required for your telescope to resolve the two stars of the binary system?
rad
(b) Having graduated with a degree in astronomy, you seek a job at the Arecibo radio telescope. You use a large radio
telescope (300-m diameter) to observe the same binary system that you observed in part (a). You estimate that the
average radio emissions from the system have a wavelength of 5.44 cm. What is the minimum angular separation
required for the Arecibo telescope to resolve the two stars of the…
A grating with 410 grooves/mm is used with an incandescent light source. Assume the visible spectrum to range in wavelength fromm 400 nm to 700 nm. How many orders can one see the entire visible spectrum?
A. 3
B.4
C.5
D.6
E.7
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