Question

Help please!!

Answer 1

1. An electromagnetic wave in a vacuum has a wavelength of 0.07 m. What is its frequency? (1 point)
f = 3.0 • 108 m/s
f = 4.3 • 109 Hz
f = 3.0 • 109 Hz
f = 4.3 • 108 m/s
2. Which of the following occurs as light travels farther from its source? (1 point)
Far from the source, photons come together in a small area.
The intensity of light increases as photons move away from the source.
The source gives off less light as photons move away from it.
Far from the source, photons spread over a larger area.
3. Infrared rays have a shorter wavelength than (1 point)
ultraviolet rays.
X-rays.
radar waves.
gamma rays.
4. In order of increasing light-transmitting capabilities of materials, which is the correct sequence? (1 point)
transparentopaquetranslucent
opaquetransparenttranslucent
opaquetranslucenttransparent
translucenttransparentopaque
5. Which of the following occurs as a light wave bends when it passes from one medium into another? (1 point)
constructive interference
refraction
destructive interference
reflection

Answer 2

wavelenth * frequency = velocity of ligh in vacuum can you now solve first one

Answer 3

Farther from the source, photons spread over a larger area.

Answer 4

nfrared rays have a shorter wavelength than radar waves.

Answer 5

opaquetranslucenttransparent

Answer 6

refraction