Below is the image of an eclipsing binary system. When you see both red and blue star, you are observing the maximum brightness. When the red star moves in front of the blue star, the brightness drops. Once the ecipse ends, the brightness comes back to the maximum level. Questions - when the red star moves behind the blue star, what will happen to the total brightness of this binary system? a - no dip b - less dip or decrease than when the red star is in front of the blue star. c - exactly same brightness as when the red star is in front of the blue star. d - more dip or decrease than when the red star is in front of the blue star. hint - think about which star is emitting more light per area. Hotter light source emits more light per area. * Eclipsing binary Red star and a blue star, eclipsing each other. ●

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