A student shines a mixture of red and blue light onto a blue toy car. What colour will the car appear?

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

Which object is most likely represented by a dot?

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?