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Hoochie [10]
3 years ago
12

We spend our lives in visible light without risks to our health. Yet exposure to UV waves in sunlight can cause skin cancer. Wha

t is the BEST explanation for this?
A) UV waves are longer and carry more energy.
B) UV waves are higher frequency and carry more energy.
C) UV waves have a lower frequency and carry more energy.
D) UV waves travel faster than visible light and have more energy.
Physics
2 answers:
dedylja [7]3 years ago
6 0
<span>UV waves are higher frequency and carry more energy causing exposure to UV waves in sunlight to skin cancer. This is a type of electromagnetic radiation similar to the waves of the radio, infrared, x-rays and gamma. All of which comes from the sun however cannot be seen by a human eye. People use these rays for tanning however if it is overdone, it may cause skin problems.</span>
Trava [24]3 years ago
3 0
The correct answer is
<span>B) UV waves are higher frequency and carry more energy. 

In fact, UV waves have higher frequency than visible light. For comparison, visible light has frequency in the range 430-770 THz (</span>10^{12} Hz)<span>, while ultraviolets (UV) have frequency higher than these values (at the order of 1 PHz, </span>1\cdot 10^{15}Hz).

The energy of electromagnetic radiation is proportional to its frequency, according to the equation
E=hf
where h is the Planck constant and f is the frequency. We see that the higher the frequency, the greater the energy, so UV waves carry more energy than visible light.
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Answer:

Dx = -0.5

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Explanation:

Two vectors are given in rectangular components form as follows:

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(i + 6j) - (3i - 7j) - 4D = 0

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Therefore,

<u>Dx = -0.5</u>

<u>Dy = -0.25</u>

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