9-1 Topic 5 Electromagnetic Wave

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Which of these is correct for the light as it enters the glass shown at P?

  • frequency decreases
  • frequency increases
  • speed decreases
  • speed increases

The image produced in the following diagram is real because it is

  • In focus
  • Magnified
  • On a screen
  • Smaller

With reference to the previous diagram. The light that travels from the stars transfers

  • Charge
  • Energy
  • Mass
  • Matter

The distance X in the following diagram is the:

  • the focal length
  • the object distance
  • the eyepiece distance
  • the magnification

The critical angle for glass in air is 42. Which of these diagrams shows the ray of light after it meets the boundary between glass and air?

  • A
  • B
  • C
  • D

Ritter, discovered ultraviolet radiation. Too much exposure to ultraviolet radiation may cause

  • deafness
  • heating of internal body cells
  • damage to the eyes
  • damage to the bone cells

Three signals, ultraviolet, visible light and infrared, are sent from the surface of the Moon to an orbiting spacecraft. The three signals are sent at the same time. Which of these is correct for the signals arriving at the spacecraft?

  • the visible light signal arrives first
  • the ultraviolet signal arrives first
  • the infrared signal arrives first
  • all three signals arrive at the same time

An endoscope uses glass fibres to enable doctors to 'see' inside a person. Rays of light travel along the glass fibres by

  • total internal correction
  • total internal diffraction
  • total internal reflection
  • total internal refraction

A wind generator is used as the source of energy for a remote farmhouse. If the farmhouse is about 7 m high, the height of the axle of the generator is

  • 20m
  • 50m
  • 100m
  • 150m

Galileo was one of the first scientists to use a telescope to study Venus. Which of these diagrams best shows how light waves enable us to see Venus?

  • A
  • B
  • C
  • D