HELP ASAP PLS. Choose an optical instrument or a tool. Tell us the type of diffraction it uses. How it works and how diffraction makes this instrument/tool useful.
Drawing the path of light is mandatory for each instrument/tool you choose.

An object thrown vertically upward from the surface of a celestial body at a velocity of 36 m/s reaches a height of sequalsminus0.9tsquaredplus36t meters in t seconds. a. determine the velocity v of the object after t seconds. b. when does the object reach its highest point? c. what is the height of the object at the highest point? d. when does the object strike the ground? e. with what velocity does the object strike the ground? f. on what intervals is the speed increasing?

Which of the following correctly describes the early view of catastrophism?

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.