What type of mirror is needed to form real images?
Real images can be formed by a converging mirror.
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How do the spectra of giants, supergiants, and main-sequence stars differ?
What will be an ideal response?
Size of the Nucleus: To a reasonable approximation, the density of a nucleus
A. is independent of the mass number. B. is greater for large-Z nuclei. C. is smaller for large-Z nuclei. D. varies unpredictably for different values of Z.
In the formula E=mc2, what does E represent?
A) the mass-energy, or potential energy stored in an object's mass B) the kinetic energy of a moving object C) the radiative energy carried by light D) the gravitational potential energy of an object held above the ground
An object is placed on an optical bench. A lens with a focal length of 15 cm is placed 30 cm from the object. A diverging lens with a focal length of -10 cm is placed 7.0 cm beyond that
Where is the final image formed, relative to the second lens? A) 45 cm beyond the diverging lens B) 20 cm behind the diverging lens C) 18 cm behind the diverging lens D) 17 cm beyond the diverging lens E) 30 cm beyond the diverging lens