In your own words, explain why the period between 1960 and 1969 is regarded as the busiest period in space exploration history. what are two technological advancements or discoveries from this time period

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?

Energy flows from the producer level to the level. is called

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.