The wavelength range of the visible spectrum is approximately 400 nm−700 nm. white light falls at normal incidence on a diffraction grating that has 350 slits/mm.

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

How many neutrons does plutonium -196 with an atomic number of 78.

2. which of the following devices is associated with the reception of radio signals? o a. demodulator o b. transmitting antenna o c. oscillator o d. microphone