a lightweight material is being tested for effectiveness in blocking ultraviolet (uv) rays from the sun that…

a lightweight material is being tested for effectiveness in blocking ultraviolet (uv) rays from the sun that cause skin to burn and possibly develop skin cancer. which method would be most helpful for testing this material?\nuse specialized equipment to measure how much uv light passes through stacks of one, five, or 20 layers of the material.\ntest the material in controlled natural settings by using natural uv light, and measure the uv light that passes through.\nwrite a survey that asks people on beaches about their preferences for sunscreen and protective materials.\ntest the material in a lab setting by using humans and a variety of uv light sources, and develop a scale to measure the damage that is caused to human skin.

a lightweight material is being tested for effectiveness in blocking ultraviolet (uv) rays from the sun that cause skin to burn and possibly develop skin cancer. which method would be most helpful for testing this material?\nuse specialized equipment to measure how much uv light passes through stacks of one, five, or 20 layers of the material.\ntest the material in controlled natural settings by using natural uv light, and measure the uv light that passes through.\nwrite a survey that asks people on beaches about their preferences for sunscreen and protective materials.\ntest the material in a lab setting by using humans and a variety of uv light sources, and develop a scale to measure the damage that is caused to human skin.

Answer

Brief Explanations:

Testing the material's UV - blocking ability requires direct measurement of UV light transmission. Specialized equipment to measure UV light passing through different layer amounts gives objective data. Testing in natural settings may have variable UV sources. A survey about preferences is not relevant to the material's effectiveness. Testing on humans in a lab has ethical issues and is not the most straightforward way to test the material's UV - blocking property.

Answer:

Use specialized equipment to measure how much UV light passes through stacks of one, five, or 20 layers of the material.