Students are introduced to the term wavelength in optics at school level. In this paper, we present an inexpensive and simple method to measure the wavelength of the light of a light emitting diode using a light depending resistor. This experimental set-up is developed at Science Laboratory, Nehru Planetarium (Mumbai), India. It is useful as an…

The advancement of breakthrough concepts in science and their implementation in society can only be achieved by starting early with the education of new generations of scientists. The concept of 'Replacement, Reduction and Refinement' (the 3Rs) in regards to animal use was first described by Russell and Burch in 1959. The 3Rs have nowadays a…

The pendulum was an important scientific instrument in the 17th century. It became a typical textbook problem in the 18th century. After the introduction of vectors in physics in the 1890s, the pendulum problem started to be progressively solved in the manner we know nowadays from introductory mechanics courses. Starting from "F = ma"…

The real-time graphing of simple harmonic motion of mass on springs with an Arduino based on an experiment set for teaching and learning physics in high schools where students can learn from real experiences. The objectives of this study are to create and develop a real-time measurement for vertical oscillations of mass on springs using the…

Problem-based learning (PBL) is an acclaimed educational concept for laboratory teaching in chemistry, which significantly affects learner motivation. A central aim of PBL is to overcome educational problems with "cook-book" laboratories. For example, when students receive experimental instructions and apply the instructions similar to…

The global COVID-19 pandemic has had a significant impact on university course design, implementation, and instruction, with many courses being offered remotely rather than face-to-face to prevent the spread of COVID-19. As the COVID-19 pandemic subsides, more and more courses are transitioning back to face-to-face instruction. In this article, we…

Inquiry- and context-based learning (IBL and CBL, respectively) can lead to improved student outcomes, including increased motivation and interest, the development of critical thinking skills, and improved assessment results. This study outlines the application of IBL research projects in third-year university Environmental Chemistry and…

Given the recent state of social distancing, the online lab experience discussed in this article offers an economical and versatile approach to online undergraduate chemistry lab instruction. With videoconferencing software, this experience is easily adaptable to a socially distanced learning environment, although it was initially designed for a…

Ever since Newton's groundbreaking work on the composed nature of light, additive colour mixing (and its laws) are subject to the interest of physicists as well as other sciences. In this paper, we present a setup for simple lab or home experiments on additive colour mixing and the laws of colour mixing. Students use the screen of a laptop or…

Course-based Undergraduate Research Experiences (CUREs) incorporate research opportunities into the existing curriculum often by providing alternatives or replacing the traditional cookbook-based laboratory courses. Over the past 50 years, CURE courses have been shown to benefit both students and faculty members alike. Despite the large number of…

This study reported the effects of a research-based laboratory module on students' scientific research, green chemistry, and research skills self-efficacy in a second-semester general chemistry laboratory course. The research-based laboratory module was designed based on the course-based research experience (CURE) model, which features materials…

A set of inexpensive and pedagogically rich experiments focusing on S[subscript N]1, E1, and E2 reactions have been updated to include modern computational and spectroscopic analyses. The S[subscript N]1 experiment involves treatment of "tert"-amyl alcohol with hydrochloric acid to generate the corresponding alkyl chloride, which is used…

In high school and elementary college physics labs the measurement of vertical distance is often required. Measuring the distance an object falls or the vertical displacement of springs in a Hooke's law experiment are commonplace. Determining these distances to perhaps a millimeter or two of precision is difficult without an expensive height gauge…

Arduino microcontrollers are becoming increasingly popular in the physics/astronomy community. These devices can provide more in-depth labs on mechanics, electricity and magnetism, light and optics, etc., in addition to programming. These devices can be readily utilized to reach more non-physics/astronomy majors and underrepresented STEM students.…

The catalytic hydrogenation of alkenes and alkynes is an important part of the undergraduate chemistry curriculum and is a fundamental process in chemical industry. Inquiry-based laboratory activities are presented that investigate the hydrogenation of alkynes on a nanoparticle palladium surface to form alkenes, which go on to form alkanes. Alkyne…