Answer and Explanation:

1. Visible Light - However, since visible light is the part of the electromagnetic spectrum that our eyes can see, our whole world is oriented around it. We often use visible light images to see clouds and to help predict the weather. We not only look at the Earth from space but we can also look at other planets from space. Causes pigmentation in melanocompetent individuals and induces DNA damage in the human skin through ROS production. The visible light radiation can exert various biologic effects such as erythema, pigmentation, thermal damage and free radical production.
2. Radio waves - are used for communication such as television and radio. Radio waves are transmitted easily through air. They do not cause damage if absorbed by the human body, and they can be reflected and refracted to change their direction. These properties make them ideal for communications. They also carry signals for your television and cellular phones. The antennae on your television set receive the signal, in the form of electromagnetic waves, that is broadcasted from the television station. It is displayed on your television screen.
3. The drawback OR DISANVANTAGE of using antenna generated microwaves in mobile phones is that, being small, they can’t put out much power, and need a constant line of sight to the transmitter. This means that mobile phone companies need to have many transmitter towers. Prolonged exposure to microwaves is known to cause “cataracts” in your eyes, which is a clouding of the lens affecting vision. Recent research indicates that microwaves from mobile phones can affect parts of your brain. Although this theory lacks definitive proof, the consensus is that prolonged phone exposure to the head should be avoided if you’re young and your brain is still growing. Other disadvantages of microwaves include: they are easily obstructed by obstacles, buildings, microwaves suffer from attenuation due to atmospheric conditions, and towers are expensive to build.
4.  ROYGBIV

• RED
• ORANGE
• YELLOW
• GREEN
• BLUE
• INDIGO
• VIOLET

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