The visibility due to scattering only is found to be 3km. What percentage of light will pass through a length of 0.3 km if the limit of visibility is defined as (a) a 98% reduction

Plot a graph of sin(θi) versus sin(θr) in an application such as Excel.  Execute a linear regression fit and display the fit equation as well as the correlation coefficient.

An astronomer is calibrating a spectrometer that uses a dittraction grating to separate light in order ot increasing wavelength (2,, 1e, and 1). She observes three distinct tirst-order spectral lines at the following respective angles 0, (where m denotes order). 8, = 12.7°, 8, = 14.2°, 0, = 14.9c (a) If the grating has 3,680 qrooves per centimeter, what wavelength (in nm) describes each of these spectral lines? at 8, - 12.70 nm at 6, = 14.2° nm al 8, = 14.9° d = (b) At what angle (in degrees) would each of these lines be found in the second-order spectrum? for 2, 0, - for å, 0, for 2. 8, =

Consider a typical red laser pointer with wavelength 653 nm.  What is the light's frequency in hertz? (Recall the speed of light c = 3.0 × 108 m/s).