The spreading of wave at the edges or obstacle is called
Reflection
Refraction
Diffraction
Interference
The phenomenon in which electrons are ejected from metal surfaces when electromagnetic waves fall on them is called
Photoelectric effect
Magnetism
Spectrum
All types of electromagnetic reaction travel through vacuum at
3 × 108 m/s
3 × 108 km/s
3 × 10-8 m/s
3 × 10-8 km/s
The behaviour of water waves can be studied in
Deep water
Shallow water
Ripple tank
Sea water
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
Light of one colour and so of one wavelength is called
Infrared radiation
Ultraviolet radiation
Monochromatic light
X-rays
Waves travel more slowly in
Ocean
River water
The height of a crest or the depth of a trough measured from a wave is called
Wavelength
Displacement
Frequency
Amplitude
The longitudinal and transverse waves produced by earthquake are called
Radio waves
Infrared waves
Ultrasonic waves
Seismic waves
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
