Why is it believed that life can not evolve on a planet that orbits a spectral type A, B or O star?
a. These stars produce too much infrared radiation which would destroy carbon-based organisms.
b. These stars have very small life zones.
c. These stars are not capable of producing planets.
d. These stars do not remain on the main sequence long enough for life to evolve.
e. These stars take too long to form.
D
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Consider an experiment where we send monochromatic light to a distant screen through a single narrow slit. The distance between adjacent dark fringes in the diffraction pattern displayed on the screen (A) increases, (B) decreases, or (C) remains the same if, We look at fringes farther from the central maximum.
A. Increases B. Decreases C. Remains the same
Halley's comet is named after the English scientist Edmund Halley because he
A) discovered it. B) was the first to see it in 1682. C) calculated its orbit and predicted that it would return in 1758. D) was the most famous astronomer in England during its appearance. E) was the first to publish pictures of it and report it to the International Astronomical Union (IAU).
The bending of light rays around corners is called
a. reflection. b. refraction. c. interference. d. diffraction.
If the headlights on a car are separated by 1.3 m, how far down the road can they be resolved if the angular resolution of the eye is about 5 × 10-4 rad?
A) 1.3 km B) 5.0 km C) 4.8 km D) 0.65 km E) 2.6 km