The question asks to identify the inventor generally credited with the modern periscope. This requires knowledge of historical inventions and their respective inventors.
The modern periscope, which uses prisms or mirrors to allow observation from a concealed position, is largely attributed to Jules Carpentier. While basic periscope principles existed earlier, Carpentier's design significantly advanced the device for practical use, especially in submarines.
D) Jules Carpentier is widely credited with inventing the modern periscope. His design, which incorporated lenses and prisms for a clearer and more stable image, was crucial for its adoption in submarines and other military applications in the late 19th and early 20th centuries.
The question asks for the year in which the modern periscope was invented. This is a factual recall question related to the history of scientific instruments and military technology. We need to identify the specific year associated with the invention of the modern periscope.
Correct Option: C) 1902 is the correct year for the invention of the modern periscope by Simon Lake.
The question asks about the primary principle behind the working of a periscope. A periscope is an optical instrument used for viewing objects that are not in the direct line of sight. Its operation relies on how light interacts with mirrors or prisms.
Correct Option: B) Reflection
A periscope primarily relies on the principle of reflection. Light rays from an object strike a mirror (or prism) at one end of the periscope, are reflected down the tube, and then strike another mirror (or prism) at the other end, which reflects them into the observer's eye. This allows the observer to see objects that are otherwise obstructed.
A periscope is an optical instrument that uses a system of mirrors or prisms to allow observation over, around, or through an object, or an obstruction. The basic principle involves reflecting light rays to change their path. For a simple periscope, two plane mirrors are used, placed parallel to each other, but at an angle to the incoming and outgoing light rays to achieve the desired reflection.
Correct Option: B) 45 degrees. In a basic periscope, each mirror is placed at an angle of \(45^\circ\) with respect to the axis of the periscope tube. This orientation ensures that the incoming light ray is reflected by \(90^\circ\) by the first mirror, and then the reflected ray is again reflected by \(90^\circ\) by the second mirror, allowing the light to travel from the object to the observer's eye.
The question asks to identify the individual who significantly improved the periscope design for submarines. This requires knowledge of historical figures in submarine and optical technology development.
Correct Option: C) Simon Lake
Simon Lake was an American mechanical engineer and naval architect who made significant contributions to early submarine design. He is particularly known for his improvements to the periscope, making it a practical and essential tool for submarine navigation and observation. His innovations helped overcome many of the limitations of earlier periscope designs.
The question asks to identify the component in a periscope that first collects light from the target. Understanding the basic working principle of a periscope, especially how it allows viewing objects that are not in the direct line of sight, is key to answering this question.
Correct Option: B) Objective lens
The objective lens (or objective mirror/prism system) is the component positioned at the end of the periscope that faces the target. Its primary function is to collect light rays emanating from the target object and form an initial image.