Which of the following instruments does not contain lenses?

Options

A. Microscope
B. Camera
C. Binoculars
D. Periscope

Explanation

To determine which of the following instruments does not contain lenses, we can analyze each option provided:

1. **Microscope**: A microscope is an optical instrument used to see small objects that are not visible to the naked eye. It contains lenses to magnify the image of the small objects. Therefore, it does contain lenses.

2. **Binoculars**: Binoculars are used for viewing distant objects. They consist of two telescopes mounted side by side, and they also contain lenses to magnify the view of distant objects. Thus, binoculars contain lenses.

3. **Camera**: A camera is a device used to capture images. It relies on a lens to focus light onto a sensor or film to create a photograph. Therefore, a camera also contains lenses.

4. **Press Bioscope**: A press bioscope is an optical device that uses two plane mirrors to reflect light and create an image. It does not use lenses for its operation, relying instead on the reflection of light from mirrors.

Based on this analysis, the instrument that does not contain lenses is the **Press Bioscope**.

**Final Answer**: Press Bioscope

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