A. Light waves
B. Microwaves
C. Radio waves
D. Sound waves
A. Milligram per decilitre
B. Millimeter of Hg
C. Parts per million
D. Grammes per litre
A. Hydrogen with oxygen
B. Methane with air
C. Oxygen with actylene
D. Carbon dioxide with ethane
A. Sodium acetate
B. Calcium oxalate
C. Magnesium sulphate
D. Calcium
A. A denser medium to a rarer medium
B. A rarer medium to a denser medium
C. A rarer medium to a denser medium and the angle of incidence is less than the critical angle
D. A rarer medium to a denser medium and the angle of incidence is greater than the critical angle
A. Quartz crystal
B. Titanium needle
C. Barium titanate ceramic
D. Laser beam
A. Reflection and transmission
B. Reflection and diffraction
C. Diffraction and transmission
D. Refraction, diffraction and transmission
A. Stable
B. Isobars
C. Isotopes
D. Radioactive
A. Radio-waves
B. Infrared
C. Ultraviolet
D. Visible