Who among the following Indian scientists invented the "crescograph", a device for measuring plant growth?

Jagdish Chandra Bose

The correct answer is Option (3) → Jagdish Chandra Bose

The Indian scientist who invented the crescograph was Jagdish Chandra Bose (often referred to as J.C. Bose).

About the Invention

The crescograph is a highly sensitive instrument used to measure the growth of plants. J.C. Bose invented it in the early 20th century to prove his hypothesis that plants have a circulatory system and can feel pain and affection, much like animals.

• Sensitivity: The device was remarkable for its time, capable of magnifying the movement of plant tissues up to 10,000 times.
• Purpose: It allowed Bose to record how plants reacted to different stimuli such as temperature, chemicals, gases, and electricity.
• Impact: His work laid the foundation for chronobiology and demonstrated that plants respond to the environment through electrical signals.