1. What is the wavelength of a radio wave being broadcast by a radio station of frequency 640 kilohertz?   Answer (43.0K)

2. What is the frequency of yellow light of wavelength 580 nm?   Answer (43.0K)

3. What is the speed of a beam of green light in a vacuum?   Answer (30.0K)

4. A diffraction grating has 2000 slits ruled in a space of 1.3 cm. What is the distance between adjacent slits?   Answer (31.0K)

5. Yellow light of wavelength 570 nm strikes a double slit with a spacing of 0.4 mm. If the interference pattern is observed on a screen located 0.9 m from the double slit, how far from the center of the screen is the second bright line from the central bright line?   Answer (45.0K)