A double convex lens has a focal length of 0.10 m. An object 0.05 m high is placed 0.15 m from the lens surface on the principal axis. Sketch a ray diagram and give the characteristics of the image
Real, inverted, and smaller
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Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in parallel with the previous lightbulbs, and again take note of the brightness. Repeat the process with the third lightbulb, connecting it in parallel with the other two. As the lightbulbs are added, the power
delivered by the battery (neglect the battery’s internal resistance) 1.increases. 2.decreases. 3.remains the same. 4.Need more information.
A source of sound has an intensity 11 and when its sound level is measured at a fixed distance the value found is 66dB. The source then has its intensity increased to 12 and when its sound level is measured at the same distance the value found is 98 dB. What is the ratio 12/11?
What happens to light passing through even thin clouds of dust?
A) The light that passes through them is blueshifted due to the cloud's approach. B) Its motion causes all light to be redshifted as it passes through these clouds. C) Its motion causes the light of stars beyond to twinkle. D) Even a little can completely block all light, such as the Horsehead Nebula. E) It dims and reddens the light of all more distant stars.
If the merger theory is correct, the brightest active galactic nuclei should
A) form small irregular galaxies. B) contain supermassive black holes. C) contain the least mass. D) contain the youngest stars. E) be in the smallest elliptical galaxies.