Four different objects have spectra that peak in the wavelength regions listed below. Which peak wavelength region is associated with the coldest of the four objects?
A) x-rays
B) visible light
C) infrared
D) ultraviolet
A) x-rays
You might also like to view...
Heisenberg is especially noted for his
A) wave equation. B) improved periodic table. C) dirigible. D) uncertainty principle. E) photoelectric theory.
Graphical Interpretation of Work: A force acts on an object, causing it to move parallel to the force. The graph in the figure shows this force as a function of the position of the object. How much work does the force do as the object moves from 0 m to 4 m?
A. 20 J B. 30 J C. 0 J D. 40 J E. 70 J
Spherical Mirrors: Suppose you wanted to start a fire using a mirror to focus sunlight. Which of the following statements is most accurate?
A. It would be best to use a plane mirror. B. It would be best to use a convex mirror. C. It would be best to use a concave mirror, with the object to be ignited positioned at the center of curvature of the mirror. D. It would be best to use a concave mirror, with the object to be ignited positioned halfway between the mirror and its center of curvature. E. One cannot start a fire using a mirror, since mirrors form only virtual images.
The expansion of the universe seems to be accelerating. The evidence for this is based on observations of
A) the manner in which the stars are distributed in our own galaxy. B) the cosmic background radiation. C) the slowing down in the pulsation rate of distant neutron stars. D) gas clouds orbiting the centers of galaxies. E) the redshift in the light from the explosions of distant supernovas.