wavelengths and frequencys?

Question

27. A beam of blue light has a wavelength of 595 nm. What is its frequency?
2.40 x 100 Hz
5.04 x 1014 Hz
4.36 Hz
5000000000000 Hz

28. If the wavelength of an electromagnetic wave is 401 mm, what is its frequency?
7.48 x 108 cycles per second
7.48 x 105 cycles per second
1.34 x 10-9 cycles per second
3.00 x 108 cycles per second

29. If the energy of a particle is 1.5903 x 10-29 joules, what is the wavelength of the particle?
12,499 m
6.94 x 104 m
1.25 x 104 m
24,000 m

30. If a wave completes 876 cycles in a minute, what is its frequency? 14.6 Hz
5.26 X 104 Hz
6.85 x 10-2 Hz
impossible to determine

31. If a wave has a frequency of 6.9536 x 109 Hz and an energy of 4.6076 x 10-24 J, what is its amplitude?
532 nm
3.9574832 x 103 nm
100 nm
all of the above are possible amplitudes

32. If a wave has a frequency of 6.9536 x 109 Hz and an energy of 4.6076 x 10-24 J, what is its wavelength?
4.3143 x 102 m
4.31 x 10-2 m
6.95 x 109 m
6.6262 x 10-34 m

Answer 1

First remember 1 cycle per second = 1HZ

27 ) c/f = 310^8/59510ç(-9)= 5 10^14 Hz

28) 310^8/401*10^(-3)= 7.4810^8 Hz

29) E=hf =hc/wave;
wavelength= 6.6210^34*310^8/1.590310^-29=1.25*10^4m

30) 14.6 Hz

31) do not know

32)c/f =wavelength = 310^8/6.953610^9= 4,31 10^-2m

Answer 2

velocity = frequency x amplitude wavelength = this is the area between 2 consecutive factors/debris that are vibrating partly. frequency = this is the type of oscillations of the medium debris in preserving with unit time % = a level of how briskly the wave go back and forth

Answer 3

wavelength x frequency = velocity
Energy equivalence of frequency = h * frequency (h = planck's constant)
Energy equivalence of wavelength = h*c/L c = light velocity, L = wavlength

Answer 4

velocity = frequency * wavelength
just use dis formula n get da answers...