Basics Of Light Quiz

The video explores the phenomenon of bioluminescence, highlighting dinoflagellates as natural light sources. It includes exercises to differentiate natural and artificial light sources. The video explains the relationship between energy, frequency, and wavelength, focusing on the visible spectrum. It debunks myths about sunlight, emphasizing its polychromatic nature. Practical applications of light, such as X-rays and IR therapy, are discussed, along with the use of UV light in detecting counterfeit currency.

What phenomenon causes certain marine organisms to emit light?

• Fluorescence

• Bioluminescence

• Phosphorescence

• Photosynthesis

Which of the following is a natural source of light?

• TV Monitor

• Moonlight

• Torch

• Candle

As frequency decreases, what happens to the energy in the electromagnetic spectrum?

• Energy fluctuates

• Energy decreases

• Energy remains constant

• Energy increases

Which part of the spectrum has the highest energy?

• Radio waves

• Infrared

• Visible light

• Gamma waves

What type of light does the sun emit?

• Only ultraviolet

• All wavelengths in the electromagnetic spectrum

• Only yellow light

• Only infrared

Which wavelength of light is used to investigate a backache?

• Infrared

• X-rays

• Microwaves

• Ultraviolet

What part of the spectrum is used to detect counterfeit currency?

• Visible light

• Radio waves

• Infrared

• Ultraviolet