A diffraction grating with 10 rulings is illuminated by a light ...

[TVarnum]

A diffraction grating with 10 rulings is illuminated by a light source. When do other wavelengths begin to distinguish themselves from 500 nm in the second order?
  1.at 475 nm and 525 nm
  2.at 450 nm and 550 nm
  3.at 495 nm and 505 nm
  4.at 487.5 nm and 512.5 nm

Question 2

In order to maximize the resolution in the visible range of a circular aperture such as a telescope, it is best to
   
  1.apply a violet filter and use the telescope with the largest aperture possible.
  2.apply a red filter and use the telescope with the largest aperture possible.
  3.apply a violet filter and use the telescope with the smallest aperture possible.
  4.apply a red filter and use the telescope with the smallest aperture possible.

[Jmfn03]

Answer to Question 1

1

Answer to Question 2

1

[TVarnum]

Gracias!

[shewald78]

Excellent