Search results
Results From The WOW.Com Content Network
Infrared cut-off filters, sometimes called IR filters or heat-absorbing filters, are designed to reflect or block near-infrared wavelengths while passing visible light. They are often used in devices with bright incandescent light bulbs (such as slide and overhead projectors ) to prevent unwanted heating.
Instrument rating refers to the qualifications that a pilot must have in order to fly under instrument flight rules (IFR). It requires specific training and instruction beyond what is required for a private pilot certificate or commercial pilot certificate, including rules and procedures specific to instrument flying, additional instruction in meteorology, and more intensive training in flight ...
The -ir verbs differ from the -er verbs in the following points: The vowel of the inflections is always -i-, for example -isse in the past subjunctive rather than the -asse of the -er verbs. A few of the singular inflections themselves change, though this is purely orthographic and does not affect the pronunciation: in the simple present and ...
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more