Need help with Chemistry, questions about Light, frequency, wavelength?

1. Which of the following makes light waves of the electromagnetic spectrum different ocean waves or sound waves?
A) Light waves do not require a medium to travel through
B) Light waves travel at different speeds depending upon the medium they are in
C) Light waves have higher amplitudes
D) Only light waves can be described by the terms crest, trough, amplitude, wavelength, and frequency


2. Which of the following statements about the electromagnetic spectrum is true? (choose more than one)
A) gamma rays have more energy than radio waves
B) microwaves have higher frequency than x-rays
C) all waves in the electromagnetic spectrum travel at the speed of light (3.00 x 10^8 m/s)
D) visible light waves have longer wavelengths than inferred waves


3. Light with a frequency of 7.3 x 1014 Hz lies in the violet region of the visible spectrum. What is the wavelength of this frequency of light in meters? Show correct equation for this problem please, before plugging in the values!


4. Light with a wavelength of 490 nm is emitted by copper when it is heated in a flame. What is the frequency of this light in Hz?

5. Light with a wavelength of 490 nm is emitted by copper when it is heated in a flame. What is the frequency of this light in Hz? Show conversation from nm to m for wavelength using dimensional analysis, and show correct equation for this problem please, before plugging in the values!


I am confused and any help would be so appreciated!