Suppose pure-wavelength light falls on a diffraction grating. what happens to the interference pattern if the same light falls on a grating that has more lines per centimeter? what happens to the interference pattern if a longer-wavelength light falls on the same grating? explain how these two effects are consistent in terms of the relationship of wavelength to the distance between slits.

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

Select all the correct answers. which three statements about electromagnetic radiation are true?

Consider two regions of space containing a static electric field, region a and region b. in region a the equipotential lines are more closely spaced than those in region b. what can be said about the relative strength of the electric field in the two regions? a) the electric field in region a is stronger th