The spreading of wave at the edges or obstacle is called
Reflection
Refraction
Diffraction
Interference
Which waves can be used for cooking?
Infrared waves
Microwaves
Radio waves
Light waves
In the electromagnetic spectrum which waves have the longest wave length?
Light wave
X -rays
The distance between two successive crest or trough is called
Displacement
Wavelength
Frequency
Amplitude
If the earthquake occur under the sea, the seismic energy can be transmitted to the water and produce
Ultrasonic echo
Ultra violet radiation
Seismic waves
Tsunami
Which technique is used by bats to judge how far an object is?
Ultrasonic echo technique
X- ray technique
Infrasonic echo technique
Ultraviolet radiation technique
A disturbance which carries energy from one place to another without transferring matter is called
A transverse wave
A longitudinal wave
A progressive wave
Water wave
A bigger crest is formed at the point where two smaller crests from two different sources meet simultaneously is called
Waves in phase
Waves out of phase
Polarisation
The pitch of a note depends on
The frequency of the sound
The wavelength of the sound
Speed of a sound
All the above
All types of electromagnetic radiations travel through vacuum at
3 × 108 m/s
3 × 108 km/s
3 × 10-8 m/s
3 × 10-8 km/s
