Low-power Objective

A low-power objective is a microscope lens that provides relatively low magnification and a wide field of view, making it important for locating specimens and viewing overall tissue or cellular organization. Its longer focal length typically provides greater working distance and a broader observable area than higher-power objectives, allowing users to position and focus the sample efficiently before increasing magnification. In biology, low-power objectives support specimen scanning, tissue section assessment, dissection microscopy, and orientation within prepared slides. They also help preserve context by showing relationships among cells, structures, or regions that may be missed at higher magnification.

Low-power Objective - Related Videos

Research

JoVE Journal - Neuroscience
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Creating Objects and Object Categories for Studying Perception and Perceptual Learning

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Cited by 12 •

2012

We describe a novel methodology for creating naturalistic 3-D objects and object categories with precisely defined feature variations. We use simulations of the biological processes of morphogenesis and phylogenesis to create novel, naturalistic virtual 3-D objects and object categories that can then be rendered as visual images or haptic objects.

Education

JoVE Science Education - Psychology

Object Substitution Masking

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2023

Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Visual masking is a term used by perceptual scientists to refer to a wide range of phenomena in which in an image is presented but not perceived by an observer because of the presentation of a second image. There are several different kinds of masking, many of them relatively intuitive and unsurprising. But one surprising and important type of masking is called Object Substitution Masking. It has been a focus of research in vision...

Multiple Object Tracking

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2023

Source: Laboratory of Jonathan Flombaum—Johns Hopkins University In a staggeringly complex and engaging world, it is crucial to selectively process some stimuli at the expense of others. Experimental psychologists call this ability attention. Specifically, visual attention refers to the ability to selectively process aspects of a visual scene. Many paradigms used to study visual attention involve brief, punctuated, and repeated trials. However, everyday situations often place sustained demands...

Power

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2023

The concept of work involves force and displacement; meanwhile, the work-energy theorem relates the net work done on a body to the difference in its kinetic energy, calculated between two points on its trajectory. While none of these quantities or relations involves time explicitly, we know that the time available to accomplish work is often just as important as the amount of work itself. For example, sprinters in a race may have achieved the same velocity at the finish, therefore,...

Communication Objectives

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2024

Communication objectives are crucial strategic goals in marketing, serving as the backbone for promotional activities. Clear communication objectives help marketers ensure that each piece of communication serves a specific purpose, enhancing the overall impact and efficiency of their marketing efforts. Communication objectives should be SMART: specific, measurable, achievable, relevant, and time-bound. They should align with marketing goals and support brand positioning, ensuring promotional...

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