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
A ship can determine the depth of a shoal of fish or the sea-bed with the help of
A sonar
Radio waves
Micro waves
X-rays
The spreading of wave at the edges or obstacle is called
Reflection
Refraction
Diffraction
Interference
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
The phenomenon in which electrons are ejected from metal surfaces when electromagnetic waves fall on them is called
Photoelectric effect
Magnetism
Spectrum
The longitudinal and transverse waves produced by earthquake are called
Infrared waves
Ultrasonic waves
Waves travel more slowly in
Ocean
River water
Shallow water
Deep water
The behaviour of water waves can be studied in
Ripple tank
Sea water
Sound waves with frequencies above 20 kHz are called
Infrasonic waves
Microwaves
Which waves can be used for cooking?
Light waves