- What are electromagnetic fields?
- Static and low-frequency fields
- What are static and low-frequency electric and magnetic fields?
- Direct and alternating voltage
- Effects of static and low-frequency fields
- Reports & Evaluations
- Radiation protection relating to the expansion of the national grid
- Basics transfer of electrical power
- High-frequency fields
- What are high-frequency fields?
- Applications high-frequency fields
- Radiation protection in mobile communication
- What is mobile communication?
- Reports and evaluations
- What is optical radiation?
- UV radiation
- What is UV radiation?
- Sun but safe!
- What is solar radiation?
- UV radiation and ozone
- Effects of UV radiation
- Protection against UV radiation
- UV index
- Infrared radiation
- What is ionising radiation?
- Radioactivity in the environment
- Where does radioactivity occur in the environment?
- What is the level of natural radiation exposure in Germany?
- Air, soil and water
- Building materials
- Industrial residues (NORM)
- BfS laboratories
- Applications in medicine
- Radiation protection in medicine: international activities
- Applications in daily life and in technology
- Radioactive radiation sources in Germany
- Register high-level radioactive radiation sources
- Type approval procedure pursuant to RöV and StrlSchV
- Cabin luggage security checks
- Radioactive materials in watches
- Ionisation smoke detectors (ISM)
- What are the effects of radiation?
- Acute radiation damage
- Effects of selected radioactive materials
- Consequences of a radiation accident
- Cancer and leukaemia
- Genetic radiation effects
- Individual radiosensitivity
- Epidemiology of radiation-induced diseases
- Ionising radiation: positive effects?
- Risk estimation and assessment
- Radiation protection
- Basic informations
- Occupational radiation protection
- Nuclear accident management
- What happens in an emergency?
- Federal and state tasks
- In the event of an emergency
- Measuring networks
- Exercises for emergency situations
- Nuclear accidents
- Defence against nuclear hazards
- Service offers
- Radon measurements
- Incorporation monitoring
- Biological dosimetry
- Online library
- About us
- Science and research
- Research concept
- Scientific collaborations
- EU research framework programme
- BfS research programme
- Third-party funded research
- Departmental research
- Selected research projects
- Selected research results
- Professional opinions
- Laws and regulations
- BfS Topics in the Bundestag
What is Solar Radiation?
The sun is essential for life on earth. Many vital processes on the earth’s surface, such as climate and life itself, are fuelled by radiation energy from the sun. About 99.98 per cent of the overall energy accountable for the global climate originate from the sun.
Electromagnetic radiation emitted by the sun ranges from gamma radiation of less than 0.1 Nanometer (nm) wavelength to long radio waves with a maximum wavelength at 500 Nanometer, i.e. in the yellow-green range of visible light.
The sun is a natural source of electromagnetic radiation and of optical radiation.
Optical radiation as part of solar radiation
Solar radiation comprises ultraviolet radiation (UV), visible light (VIS - "visible") and infrared radiation (IR). Solar radiation is usually called „Optical Radiation“, since it is deflected, scattered or reflected by optical systems such as lenses, mirrors or prisms.
The proportion of optical radiation from the sun reaching the ground varies largely. The intensity of the optical radiation primarily depends on
- the solar altitude (latitude, time of the day and the season of the year),
- the total ozone content of the absorbing atmospheric layer, and
- the cloud cover.
UV-exposure caused by the sun might be so intense as to produce negative effects on ecosystems. There is reason for concern that ozone depletion might give rise to a significant increase in UV-exposure, thus causing permanent harm to particular ecosystems.
State of 2017.03.24