Light, sound and waves

What is the wavelength of a wave?

• Distance between two consecutive crests

• Height of the crest from rest position

• Distance from crest to trough

• Distance wave travels during one period

Which of these waves is a transverse wave?

• Sound wave

• Seismic P-wave

• Electromagnetic waves

• Ultrasound

What changes in a light ray when it passes from air into water?

• Frequency

• Speed

• Amplitude

• Phase

What is total internal reflection?

• Reflection inside a denser medium

• Reflection at the boundary of two mediums

• Refraction within the same medium

• Reflection at the critical angle

Which wave property determines the pitch of the sound?

• Amplitude

• Frequency

• Peak to trough distance

• Speed

What is the purpose of using X-rays in medicine?

• Detecting metal objects

• Measuring temperature

• Checking for broken bones

• Measuring blood pressure

Which waves are used in cooking food in a microwave oven?

• Infrared

• Gamma rays

• Radio waves

• Microwaves

Which waves require a medium to travel?

• Sound waves

• Light waves

• Gamma rays

• X-rays

What is the speed of light in a vacuum?

• 3.0 x 10^8 m/s

• 2.0 x 10^8 m/s

• 1.5 x 10^8 m/s

• 3.5 x 10^8 m/s

What is refraction?

• Reflection of waves

• Absorption of waves

• Change in wave direction when entering a new medium

• Internal reflection of waves