A theory unites and explains a broad range of observations.

A theory unites and explains a broad range of observations.

nope

Broadband essentially here mean the different frequency range or the large wavelength range. Broad band optical limiter is one which exhibits optical limiting behavior over a broad range of wavelength. Typically - in the visible and IR spectral range as we have many optical components or sensors(eye /cameras) responding in this wavelength range.

A broad range of curry recipes can be found at About, Recipes Wiki, The KitchenistaDiaries, and Badger and Blade. Curry is used in many Indian dishes.