Dispersion of Light

when white light enters a glass slab

• it reflects back

• it refracts and bends towards normal

• it refracts and bends away from normal

• it diffracts

define refractive index

• an index formed when angle of incidence is greater then critical angle

• divergent lens

• an index that shows by how much pair of material refracts light.

• an index formed when critical angle is greater then angle of incidence

refractive index of water is

• 2.78

• 0.45

• 1.33

• 0.99

which color light can be made by mixing white and red

• black

• pink

• peach

• orange

the angle of incidence for which the angle of refraction becomes 90 degree with respect to the normal is called

• angle of reflection

• angle of refraction

• diffraction angle

• critical angle

a _____ can easily fool a person travelling in desert due to refraction of light

• carriage

• mirage

• total internal reflection

• periscope

Which color has the longest wavelength

• indigo

• violet

• yellow

• red

Process of white light splitting into its constituent colors is termed as

• Reflection of light

• Refraction of light

• Dispersion of light

• Interference of light

Names of the types of lenses are

• convex and biconvex

• concave and biconcave

• biconvex and biconcave

• convex and concave