Question : The splitting of white light into its component colours is called ______.

Option 1: refraction

Option 2: reflection

Option 3: scattering

Option 4: dispersion

Question : A periscope works on the principle of:

Option 1: refraction

Option 2: total internal reflection

Option 3: diffraction

Option 4: reflection

Question : A light ray travelling from denser to rarer medium at an angle of incidence more than the critical angle of the concerned media pair suffers:

Option 1: reflection

Option 2: refraction

Option 3: diffraction

Option 4: total internal reflection

Question : The colour of the alluvial soil varies from _______.

Option 1: pale white to warm white

Option 2: light orange to dark orange

Option 3: orange to red

Option 4: light grey to ash grey

Question : The ratio of the areas of two squares one having double its diagonal than the other is:

Option 1: 3 : 2

Option 2: 2 : 1

Option 3: 4 : 1

Option 4: 3 : 1