Sources and Properties of Light

The video tutorial explores the sources and uses of light, distinguishing between natural and artificial sources. It explains how light travels and interacts with different materials, leading to phenomena like reflection, absorption, and shadow formation. The tutorial also covers the safe and efficient use of light in daily life.

What is the primary source of light for Earth?

• Stars

• Artificial lights

• The Sun

• The Moon

Which of the following is an example of a natural source of light?

• Firefly

• Electric bulb

• Flashlight

• Gas lamp

What is bioluminescence?

• Light reflected from the moon

• Light emitted by living organisms

• Light produced by man-made sources

• Light produced by the sun

Which of the following is NOT an artificial source of light?

• Electric light

• Flashlight

• Star

• Gas lamp

What should you do when using fire as a light source?

• Place it near combustible materials

• Leave it unattended

• Handle it carefully and seek adult supervision

• Use it without caution

What happens when light strikes a transparent material?

• It is reflected

• It passes through easily

• It is scattered

• It is completely absorbed

Which material allows only part of the light to pass through and scatters it?

• Transparent

• Opaque

• Translucent

• Reflective

What is the result when light is blocked by an opaque object?

• Light is absorbed

• Light is scattered

• Light passes through

• A shadow is formed

What is the sequence of colors in a rainbow?

• Blue, Green, Yellow, Red, Orange, Indigo, Violet

• Green, Yellow, Red, Blue, Indigo, Violet, Orange

• Violet, Indigo, Blue, Green, Yellow, Orange, Red

• Red, Orange, Yellow, Green, Blue, Indigo, Violet

What should you avoid doing to protect your eyes from light damage?

• Using sunglasses

• Looking directly at the sun

• Using enough light while reading

• Opening windows during the day