1, a new 500 pixels by 500 pixels document, fill the white background, the foreground color into blue
2, Filter - Filter Library - Sketch - halftone pattern to choose the appropriate size and
contrast
, pattern type select straight line.
3, select the menu Image - Image Rotate - 90 degrees
4, Filter - Distort -
Polar Coordinates
Select the plane coordinates to the polar coordinates
5, the final effect is as follows
How to make radial lines with PS?1, create a new 500 pixels by 500 pixels document, fill the white background, the foreground color into blue
2, Filter - Filter Library - Sketch - Halftone Patterns to choose the appropriate size and
contrast
, pattern type select straight line.
3, select the menu Image - Image Rotation - 90 degrees
4, Filter - Distort -
Polar Coordinates
Select the plane coordinates to the polar coordinates
5, the final effect is as follows
There are those radiations in daily life?1, building ceramics (tiles, washbasins and flush toilets)
Mainly by the clay, sand and gravel, slag or industrial waste and some natural additives and other materials molded and glazed by sintering. Because of the geological history of these materials and the formation of different conditions, more or less radioactive elements, such as thorium, radium, potassium and so on.
2, medical X-ray
Medical X-ray brings an average of 53 millirem of radiation per person per year. The third largest source of external radiation, at 28 millirems, is the food we eat, the clothes we wear, and even the paper of the magazines we hold in our hands -- radiation that is naturally associated with minute amounts of unstable isotopes.
3. Smoke detectors
Cause 10 millirems of radiation per year. Contamination from nuclear experiments sounds scary, but in fact the annual radiation is less than 1 millirem (unless you happen to be standing right next to the experimental site). The average radiation from a nuclear power plant is just as small.
4. Television
Television also emits radiation, and although the dose of X-rays generated by the TV's high-voltage power supply is weak, it is not negligible for people who watch TV for years.
5, spinach
In some provinces and municipalities in the area of sampling tests, found that spinach, lettuce leaves on a trace of radioactive iodine-131, the Ministry of Environmental Protection published data show that there are trace amounts of radioactive substances in the air iodine-131 exists. As the radioactive material in the air settles to the ground, it can contaminate vegetables grown in the open on the ground.
Extended information
There are three basic methods of radiation protection: time protection; distance protection and shielding. It is worth noting that doctors use radiation devices to the patient diagnosis and treatment of disease, according to the actual needs of the patient, weighing the pros and cons, to achieve the safe and reasonable use of radiation devices. And patiently advise those who take the initiative to request but do not need to use the radiation device diagnosis and treatment of patients, guide them out of the misunderstanding, is not necessarily the use of advanced medical equipment, can cure all diseases.
Source:
People's Daily Online - Is ceramic cleanliness radioactive?
China.com - life everywhere there is radiation (Figure)
People's Republic of China **** and the country - Ministry of Health experts: spinach on the radioactive material is easy to wash off
People's Republic of China **** and the people's government - vigilant life in the radiation