em wave problems

An electromagnetic wave in a vacuum has a wavelength of 0.07 m. What is its frequency in Hz?

• 4.3 x 10¹⁸ Hz

• 2.1 x 10¹⁶ Hz

• 2.1 x 10⁶ Hz

• 4.3 x 10⁹ Hz

An electromagnetic wave in a vacuum has a frequency of 1.3 x 10⁵ Hz, what is it's wavelength in meters?

• 2.3 x 10³ m

• 3.9 x 10¹³ m

• 3.9 x 10³ m

• 2.3 x 10¹³ m

Wavelength =       4.8x10^-12 m
Frequency = ?

• 6.2x10^-19
• 1.6x10^-20
• 1.4x10^-3
• 3.2x10^-45

Frequency = 1.05x10¹⁵ Hz
Wavelength = ?

• 2.86x10^-7
• 3.50x10⁶
• 3.15x10²³
• 6.96x10^-19

Frequency =      5.00x10⁷ Hz
Wavelength =?

• 6.00E+00
• 1.67E-01
• 1.50E+16
• 3.31E-26