Optical Components | MCQs

Explanation

A typical diffraction grating can have 400 to 50,000 lines per centimeter, depending on precision and application.

Higher line densities provide better spectral resolution for analyzing light.

Explanation

• A periscope requires a prism that can reflect light by 90 degrees, allowing the user to see around obstacles or over walls.
• An isosceles right-angled prism, also known as a 45-degree prism, is ideal for this purpose.
• It has two equal sides and a 90-degree angle between them, which allows for total internal reflection and a clear image.