Helium atoms emit light at several wavelengths. light from a helium lamp illuminates a diffraction grating and is observed on a screen 50.00 cm behind the grating. the emission at wavelength 501.5 nm creates a first-order bright fringe 21.90cm from the central maximum. what is the wavelength of the bright fringe that is 31.60cm from the central maximum?

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

** urgent** the voltage across the primary winding is 350,000 v, and the voltage across the secondary winding is 17,500 v. if the secondary winding has 600 coils, how many coils are in the primary winding? a- 30 coilsb- 583 coilsc- 12,000 coilsd- 332,500 coils

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.