Want to see correct answers?
Login or join for free!
  Physics Worksheets
Looking for Physics worksheets?
Check out our pre-made Physics worksheets!
Share/Like This Page
Filter By Grade

You are browsing Grade 8 questions. View questions in All Grades.

Grade 1 Grade 2 Grade 3 Grade 4 Grade 5 Grade 6 Grade 7 Grade 8 Grade 9 Grade 11 Grade 12 College

Browse Questions

Eighth Grade (Grade 8) Light and Optics Questions

You can create printable tests and worksheets from these Grade 8 Light and Optics questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.

Previous Page 4 of 14 Next
Grade 8 Light and Optics
What type of light is produced when thin wires in a toaster become red-hot?
  1. Infrared light
  2. Ultraviolet light
  3. Incandescent light
  4. Fluorescent light
Grade 8 Light and Optics
What is the primary natural light source on Earth?
  1. Stars
  2. The Moon
  3. Lightning during thunderstorms
  4. The sun
Grade 8 Light and Optics
Light behaves as a particle and a wave.
  1. True
  2. False
Grade 8 Light and Optics
Interference of light occurs when                                 .
  1. Light passes through a small hole
  2. Light reflects off a mirror
  3. Light waves overlap
  4. Light travels in a straight line
Grade 8 Light and Optics
Why does a straw in water appear bent?
  1. Water changes the properties of the straw.
  2. The straw genuinely bends.
  3. It's an optical illusion caused by refraction.
  4. The water absorbs light.
Grade 8 Light and Optics
What does the refractive index depend on?
  1. The speed of light in a vacuum.
  2. The color of the light.
  3. The angle of refraction.
  4. The nature of the medium, physical conditions, and color of the light.
Grade 8 Light and Optics
What causes the blue color of the sky during the daytime?
  1. Refraction of light
  2. Reflection of light
  3. The sky reflects blue light from the ocean
  4. Scattering of blue light by air particles
Grade 8 Light and Optics
What is the term for the process of transferring energy from light waves to particles of matter?
  1. Reflection
  2. Scattering
  3. Absorption
  4. Dispersion
Grade 8 Light and Optics
What happens to the energy of light when it's absorbed by an object?
  1. It's lost forever
  2. It's transformed into heat
  3. It's reflected in a different color
  4. It becomes more intense
Grade 8 Light and Optics
The                      reflection occurs when light strikes on rough or uneven surfaces?
  1. Regular reflection
  2. Diffuse reflection
  3. Specular reflection
  4. Absorptive reflection
Grade 8 Light and Optics
What is the angle between the incident ray and the normal called?
  1. Angle of reflection
  2. Angle of incidence
  3. Angle of deflection
  4. Angle of refraction
Grade 8 Light and Optics
How does controlled exposure to ultraviolet light benefit our bodies?
  1. It boosts our immune system.
  2. It enhances our vision.
  3. It triggers the production of vitamin D for calcium absorption.
  4. It helps in digestion.
Grade 8 Light and Optics
What causes the increase in the temperature of food when cooked in a microwave oven?
  1. The absorption of microwaves by metal surfaces.
  2. The reflection of microwaves by the food.
  3. The vibration of water molecules inside the food.
  4. The emission of infrared waves.
Grade 8 Light and Optics
Which of the following waves have the shortest wavelengths?
  1. Radio waves
  2. Visible light waves
  3. X-rays
  4. Gamma rays
Grade 8 Light and Optics
What differentiates light from sound in terms of propagation?
  1. Light travels slower than sound
  2. Light requires a medium to propagate
  3. Light cannot travel through a vacuum
  4. Light travels faster than sound and does not require a medium
Previous Page 4 of 14 Next