Q. How long is the Marriage License valid?A. A Marriage License is valid for 60 days, beginning the day after it is issued. Members of the armed forces who can prove they are on active duty at the time of applying for the Marriage License can obtain a Marriage License valid for 180 days.
Lesson Summary. UV light is one type of electromagnetic wave. Other electromagnetic waves include radio waves, microwaves, visible light, and X-rays. UV light is used by humans to produce vitamin D, but overexposure to UV light can damage DNA and cause painful sunburns, cataracts, and skin cancer.
Infrared radiation is used for cooking and heating. It is also used for communications signals, including TV remote controls and optical fibre communications. Information can be transmitted using analogue or digital signals. Uses of infrared radiation We cannot see infrared radiation, but we can feel it as heat energy.