In sunlight, which becomes warmer: reading glasses or dark sunglasses?
i said reading glasses because the UV waves and infrared resonate on the glass, generating more heat. and dark sunglasses just absorb the heat and convert it into internal energy
is this right? plz help me!!
The dark sunglasses will absorb the heat, and less of the heat resonates back out, so my answer would be the dark glasses. The heat is just reflected back or passed through, not absorbed.
but wouldn't sunglasses be opaque?
No, because then you wouldn't be able to see through them.
Your explanation as to why reading glasses become warmer in sunlight is partially correct. Let's break down the answer and understand it in more detail.
Reading glasses and dark sunglasses are both designed to block or filter out certain types of light. However, their primary purpose is different.
Reading glasses are typically made to correct near vision and do not typically have any specialized coating to block UV waves or infrared radiation. Therefore, they don't directly interact with UV waves or infrared radiation to generate additional heat.
On the other hand, dark sunglasses are specifically designed to block out harmful UV rays and intense sunlight. They usually have specialized coatings that absorb or reflect a significant portion of the incoming light energy. The absorbed energy is then converted into internal energy, usually through the process of molecular vibrations, which can cause the sunglasses to warm up. However, this doesn't necessarily mean that dark sunglasses absorb heat and convert it into internal energy; rather, they absorb and disperse the energy from sunlight.
To summarize, the correct answer to your question is that dark sunglasses tend to become warmer in sunlight compared to reading glasses due to the absorption of light energy. Reading glasses, which are not designed to block UV rays or infrared radiation, do not generally warm up significantly in the sunlight.
It's important to note that different materials and coatings used in sunglasses can have varying effects on how much heat is generated. Additionally, other factors, such as the color of the lenses or the frame, can also influence heat absorption.