Thin Lenses: A 4.0-cm tall apple is 20 cm in front of a plano-convex lens of focal length 75 cm.(a) Find the location of the image of the apple. Is it a real or a virtual image?(b) How tall is the image of the apple? Is it upright or inverted?
What will be an ideal response?
(a) 27 cm in front of the lens, virtual (b) 5.5 cm, upright
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A planet is orbiting a star. Which of the following statements is true for the acceleration and gravitational forces experienced by the star and the planet?
A) The acceleration of the planet is much more than the acceleration of the star, but the force on the star is the same but opposite the force on the planet. B) The acceleration of the planet is much more than the acceleration of the star, and the force on the planet is much more than the force on the star. C) The force on the star is much smaller than the force on the planet, but the accelerations are about equal.
The most famous case of a more massive hot star orbiting with a more evolved but presently less massive red giant is the eclipsing binary:
A) Aldeberan. B) Antares. C) Algol. D) Alberio. E) Altair.
You are experimentally determining the critical angle for a novel transparent solid whose index of refraction is less than that of water (n=1.33) but greater than that of air (n=1.00). Your experimental method involves work underwater in which you observe whether there is any transmitted ray at the water/solid interface as you vary the angle of incidence on the solid surface. When your device reaches an incident angle of 53 degrees you find that the transmitted ray vanishes. What is the index of refraction for this new solid?
A. 1.16 B. 0.57 C. 1.06 D. 0.53
According to modern science, approximately how old is the Sun?
A) 25 million years B) 10,000 years C) 400 million years D) 4.5 billion years