TEST SERIES - 63 (I)

In the interference pattern, energy is

• Created at the positions of maxima

• Destroyed at the position of minima

• Conserved but is redistributed

• Not conserved

When viewed in white light, soap bubbles show colours because of

• Interference

• Scattering

• Diffraction

• Dispersion

Young’s experiment established that

• Light consists of waves

• Light consists of particle

• Light is neither particle nor wave

• Light is both particle and wave

A beam of light travelling at a velocity of V m/s is incident at an angle 45° on a glass. Slab of refractive index 1.5. What is the velocity of the beam of light inside the slab?

• V

• 2 V/3

• 2 V

• None of the above

Angular separation between two colours of the spectrum depends upon

• Angle of deviation

• Angle of incidence

• Size of the prism

• All of the above

Which of the following form (s) a virtual and erect image for all position of the object?

• Convex lens

• Concave lens

• Convex mirror

• Both (b) and (c)

Total internal reflection of light is possible when light enters from

• Air to glass

• Vacuum to air

• Air to water

• Water to air

Which one of the following is used to remove astigmatism for a human eye?

• Concave lens

• Convex lens

• Cylindrical lens

• Prismatic lens

Line spectrum contains information about

• The atoms of the prism

• The atoms of the source

• The molecules of the source

• None of the above

A plane glass slab is placed over various coloured letters. The letter which appears least raised is

• Blue

• Violet

• Green

• Red