Light (Science 7)

The statement "Let there be light!" was taken from which book in the Bible?

• Philippians

• Genesis

• Leviticus

• Exodus

This theory considered light to be a wave propagating in ether.

• Wave Theory

• Particle Theory

• Electromagnetic Theory

• Quantum Theory

He is the proponent of the Particle Theory of light, which states that light consists of tiny particles emitted by a luminous object.

• Christian Huygens

• Isaac Newton

• James Clerk Maxwell

• Max Planck

What kind of wave is a light wave?

• mechanical, transverse

• mechanical, longitudinal

• electromagnetic, transverse

• electromagnetic, longitudinal

Which of the following is NOT true of the Electromagnetic Theory of Light?

• Light is emitted in discrete packets called quanta

• Light is partly magnetic and partly electrical in nature

• Light can propagate in a vacuum

• Light waves have a great range of frequencies and wavelengths

In the electromagnetic spectrum, ___ has the longest wavelength and lowest frequency, while ___ has the shortest wavelength and highest frequency.

• purple, red

• red, purple

• green, purple

• purple, green

Ancient scientists measured the speed of light by using the changes in the position of heavenly bodies.

• TRUE

• FALSE

After many observations were made, the standard value of the speed of light has been ____ since 1983.

• 186 000 mi/s

• 301 000 km/s

• 313 000 km/s

• 299 792 458 m/s

The image shows that light travels in a straight line. What property of light is being shown in the image?

• Reflection

• Refraction

• Shadow formation

• Rectilinear propagation