Page 06 7. The graphs show how the radiation per unit surface area, R, varies with the wavelength, λ, of the emitted radiation for two stars, P and Q. R (units) λ (μm) star Q star P 0 A student makes the following conclusions based on the information in the graph. I Star P is hotter than star Q. II Star P emits more radiation per unit surface area than star Q. III The peak intensity of the radiation from star Q is at a shorter wavelength than that from star P. Which of these statements is/are correct? A I only B II only C III only D I and II only E II and III only 8. One type of hadron consists of two down quarks and one up quark. The charge on a down quark is −¹⁄₃. The charge on an up quark is +²⁄₃. Which row in the table shows the charge and type for this hadron? charge type of hadron A 0 baryon B +1 baryon C −1 meson D 0 meson E +1 meson