What is the best description of black body radiation? a. they reflect visible light but let infrared light pass through. b. they reflect both visible light and infrared light. c. they reflect infrared light but let visible light pass through. d. they let both infrared light and visible light pass through.

What will a positive and a negative charge do if they are separated from each other?

Current from a charged capacitor lights a bulb. as time goes on the brightness of the

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.