Ophthalmic OpticsCâu 13 / 100
Chromatic aberration is caused by what?
a.Uneven frame pressure
b.Scratches on the lens
c.Different wavelengths of light focusing at different points
d.Anti-reflective coating
Giải thích
Because a lens refracts short (blue) wavelengths more than long (red) wavelengths, colors focus at slightly different points, producing color fringing. Materials with a low Abbe value show it most.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Add power on a multifocal lens represents what?
- If the distance Rx is -3.00 D and the add is +2.00 D, what is the total power in the reading portion?
- Vertex distance is the measured space between what two points?
- Which of the following describes a plano lens?
- Spherical aberration in a lens is best described as what?
- The index of refraction of a material is a ratio comparing what?
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Đội Ngũ Biên Tập PrepPass · Đối chiếu với ABO (American Board of Opticianry) Certified Optician Exam · Quy trình kiểm tra