The sun shines through the glass. Although this layer of glass is transparent, it also has some reflectivity. The reflection of sunlight by this reflectivity reduces the amount of sunlight passing through the glass. Therefore, the sunlight received by solar energy is also reduced. Of course, this affects its heating effect. However, the reflectivity of general glass is relatively low, and the effect on solar heating is not very obvious.
When this glass layer is colored or dirty, the effect of solar heating will be more obvious.
If this glass layer has a special device, such as sealing the solar energy in a big box with this glass layer in front, it can also improve the thermal efficiency of the energy solar. Since the thermal insulation capacity of solar tubes is not absolute, they will also lose heat. This box canhelp thermal insulation, and the glass box can also absorb part of the heat, which will improve the heat recovery efficiency.
The advantages and disadvantages of basking in the sun through a window
The advantages and disadvantages of basking in the sun through a window are explained below.
Those who bask in the sun through glass can avoid skin damage by basking in the sun through glass. Sunlight damage to human skin mainly comes from ultraviolet A and ultraviolet B. Ultraviolet A is a long wave that acts slowly on the deeper layers of the skin, but can cause spot blackening. Ultraviolet B is a medium wave that acts on the surface of the skin and has rapid effects. It can stimulate skin keratinocytes, dilate blood vessels and increase blood flow.It will first turn red and then slowly brown.
The disadvantages of basking in the sun through glass are that the glass can absorb ultraviolet rays which play a role. Without ultraviolet rays, the body cannot synthesize vitamin D and therefore cannot promote calcium absorption. Therefore, if you want to replenish calcium through the sun, you should not do it through glass.
To replenish calcium, it is best to bask in the sun between 9:00 a.m. and 10:00 a.m. and 4:00 p.m. and 5:00 p.m. every day, because the ultraviolet rays at this time are not very strong. . The sun exposure time should not be too long, 10 to 20 minutes is enough for most people, shorter for children and longer for the elderly, but generally 30 minutes is recommended. People who live at high altitudes and in long-term low-intensity hypoxic environments shouldwind extend their duration of exposure to the sun by 30 to 60 minutes per day. In winter, you should also extend the duration of exposure to the sun as much as possible.
Be careful when basking outdoors in the sun and take sun protection measures. For example, wearing sunglasses can prevent eye damage from direct sunlight, and wearing a hat can prevent your hair from getting sunburned. After spending time in the sun, be sure to drink more water and eat more fruits and vegetables to supplement vitamin C, which can inhibit melanin production and prevent sun spots.
The advantages and disadvantages of sunbathing through glass
Many people think about the advantages and disadvantages of sunbathing through glass. glass. But is this method of basking in the glass the same. Is the sun really effective?Do we really know the effects of basking in the sun? Here are the pros and cons of basking in the sun through a window.
Sunbathing through glass Advantages and disadvantages of Yang 11. Disadvantages: Traditional Chinese medicine experts point out that basking in the sun through glass has no calcium supplementation effect . Glass can absorb ultraviolet rays, so basking in the sun through glass actually has no effect.
2. Benefits: Sunbathing through glass can prevent skin damage. Glass can prevent ultraviolet rays from penetrating, which can prevent ultraviolet rays from damaging the skin.
3. Advantages: In winter, the outdoor temperature is low, sometimes the wind is strong, and the elderly or children have limited mobility. Sunbathing through the window can prevent colds and illnesses.
Summary
1. Disadvantages: Sunbathing through glass has no effect on supplementation in calcium.
2. Benefits: Sunbathing through glass can prevent skin damage.
3. Advantages: The outdoor temperature is low in winter and the glass can prevent colds.
Advantages and disadvantages of tanning through glass 2Harm: Glass can block most ultraviolet rays, but it has no effect after being exposed to the sun, because it does not promote the synthesis of vitamin D and does not promote the synthesis of vitamin D. does not increase the absorption of calcium. Tanning in the fresh air and sun It will be better to move to a bright place. When basking in the sun, the sun should be in direct contact with the skin. , which is beneficial for calcium absorption.
Although basking in the sun is aeconomical way to supplement calcium, it may not be good for babies to be exposed to ultraviolet rays for a long time. At the same time, relying on sun exposure to supplement vitamin D is limited after all.
Therefore, you should insist on taking vitamin D supplements, and it is best not to supplement them intermittently. Under normal circumstances, babies under two years old should insist on taking vitamin D supplements, except for babies who have too much. small anterior fontanelle and severe diarrhea. For babies, to avoid premature closure of the anterior fontanel or worsening of diarrhea symptoms, appropriate supplementation is necessary as directed by the doctor.
Detailed information:
Pay attention to these three things while basking in the sun Points :
1. Pay attention to time: The two time slots of 9 a.m. to 10 a.m. and 4 p.m. to 5 p.m. are appropriate. the A beam of ultraviolet rays. It contains many ingredients and is the perfect time to store the “sunshine vitamin” – vitamin D in the body. You only need to spend about half an hour in the sun every day.
2. Pay attention to the parts: you can lounge on the top of the head, lounge on the back, lounge on the hands and feet according to personal circumstances. However, excessive sun exposure can easily turn moles on the human body into melanoma or skin cancer. When basking in the sun in summer, be sure to wear sun protective clothing to cover areas covered in moles.
3. Dress appropriately: It is best not to wear black clothing when basking in the sun, dTake off your hat and gloves and try to expose your skin to the sun. It is best to bask in the sun outdoors or on a spacious balcony, and not through a glass window.
Advantages and disadvantages of tanning through glass 3No, the glass will absorb part of the ultraviolet rays, thereby affecting theTo affect the synthesis of vitamin D, it is best to spend time outdoors in the sun.
The main function of exposure to the sun is to help the body synthesize vitamin D using ultraviolet rays. Vitamin D is considered both a vitamin and a hormone because it is one of the rare exceptions among vitamins. Most vitamins cannot be synthesized by the human body and must be ingested via dietary supplements or pharmaceuticals. However, vitamin D can be synthesized by skin exposed to ultraviolet rays (light sayside of the sun is enough).
We all know that sun exposure can replenish calcium and zinc. And through sun exposure, the skin can be encouraged to produce vitamin D, and these vitamins provide 90% of the vitamin D that people need. Therefore, doctors recommend that children, middle-aged and elderly people spend more time in the sun.
You won't feel the heat when exposed to sunlight through the laminated glass, but the laminated glass helps you block ultraviolet light. Many people wonder if exposure to sunlight through laminated glass can have the effect of supplementing calcium and zinc. Here we clearly tell everyone that this is not possible!
First of all, the main cause of vitamin D in the skin is that the skin is exposed to direct ultraviolet rays and 7-dehydrocholesterol stored in the subcutaneous tissue is converted to vitamin D3.
Second, while it is true that you can receive direct ultraviolet light through glass, not all ultraviolet light can promote the skin's production of vitamin D3.
Ultraviolet light can be divided into UVA and UVB. UVA is not blocked by glass and can radiate directly to the human body through glass. Although they do not cause sunburn, they accelerate skin aging. At the same time, it has no effect on the formation of vitamin D in the skin.
First of all, the main cause of the presence of vitamin D in the skin is that the skin is exposed to direct ultraviolet rays and the 7-dehydrocholesterol stored in the subcutaneous tissue is converted into vitamin D3.
Advantages and disadvantages of tanning through a window 4Advantages
Take a bathNo sunlight through a window can prevent skin damage.
Sunlight damage to human skin mainly comes from ultraviolet A and ultraviolet B. Ultraviolet A is a long wave that acts slowly on the deep layers of the skin, but can cause occasional blackening. Ultraviolet B is a medium wave that acts on the surface of the skin and has rapid effects. It can stimulate skin keratinocytes, dilate blood vessels and increase blood flow. It will first turn red and then slowly brown. Excessive long-term exposure can even cause skin cancer.
When basking in the sun through the glass, the glass can prevent ultraviolet rays from penetrating, thereby preventing ultraviolet rays from damaging the skin. This is probably the only advantage of basking in the sun through a window.
Disadvantages
From the above, it can be seen that glass can absorb ultraviolet rays which play a role. Without ultraviolet rays, the body cannot synthesize vitamin D and therefore cannot promote calcium absorption. Therefore, if you want to supplement your calcium intake through the sun, you should not do it through a drink.
How to replenish calcium in the sun
1. It is best to do it between 9:00-10:00 a.m. and 4:00-5:00 p.m. every day Enjoy the sun during this time, as ultraviolet rays are not very strong at this time.
2. The exposure time in the sun should not be too long. For most people, 10 to 20 minutes is enough. It is shorter for children and longer for the elderly, but it is generally recommended to stay indoors. 30 minutes. People who live at high altitudes and in low hypoxic environmentsLong-term intensity should extend their duration of sun exposure to 30 to 60 minutes per day. In winter, you should also extend the duration of exposure to the sun as much as possible.
3. Be careful when basking outdoors in the sun and take sun protection measures. For example, wearing sunglasses can prevent eye damage from direct sunlight, and wearing a hat can prevent sunburn on your hair.
4. After spending time in the sun, be sure to drink more water and eat more fruits and vegetables to supplement vitamin C, which can inhibit melanin production and prevent sunspots.