The special theory of relativity is applicable to the object moving with maximum velocity equal to:

• A) More than speed of light
• B) Double the speed of light
• C) Less than speed of light
• D) Speed of light

The Stefan-Boltzmann constant (σ) has a value of:

• A) 6.67×10−11 N⋅m2/kg2
• B) 5.67×10−8 Watt/(m2⋅K4)
• C) 6.63×10−34 Joule⋅sec
• D) 3×108 m/s

Fermat's principle helps to explain the phenomenon of:

• A) Diffraction
• B) Refraction
• C) Reflection
• D) Dispersion

Length contraction is noticeable only in the direction:

• A) Perpendicular to motion
• B) Along the direction of motion
• C) Orthogonal to motion
• D) Independent of motion

If a lens has a focal length of 15 cm and another has 20 cm, which statement about their strengths in diopters is true?

• A) Strength isn't linked to focal length
• B) 20 cm lens has higher strength
• C) Both lenses have equal strength
• D) 15 cm lens has higher strength

During the time that latent heat is involved in a change of state:

• A) The temperature does not change
• B) Molecular activity remains constant
• C) The substance always expands
• D) A chemical reaction takes place

During a slow adiabatic expansion of a gas:

• A) No energy enters or leaves as heat
• B) The pressure remains constant
• C) Energy is added as heat
• D) Work is done on the gas

Which material would require the most heat to raise its temperature by 1°C?

• A) Metal
• B) Steam
• C) Water
• D) Ice

If the average kinetic energy of molecules in an ideal gas is KE at 200 K, then the average kinetic energy at 600 K will be:

• A) KE2
• B) 4KE
• C) KE3
• D) 3KE

According to the first law of thermodynamics, applied to a gas, the increase in the internal energy during any process:

• A) Equals the work done on the gas minus the heat input
• B) Equals the heat input plus the work done on the gas
• C) Is independent of the work done on the gas
• D) Equals the heat input minus the work done on the gas

Constant-volume gas thermometers using di?erent gases all indicate nearly the same temperature when in contact with the same object if:

• A) The volumes are all the same
• B) The particle concentrations are all extremely small
• C) The pressures are all extremely large
• D) The volumes are all extremely large

When light is incident perpendicular to the surface, what will be the angle of incidence and the angle of reflection?

• A) Angle of incident = 0°, Angle of reflection = 0°
• B) Angle of incident = 0°, Angle of reflection = 90°
• C) Angle of incident = 90°, Angle of reflection = 0°
• D) Angle of incident = 45°, Angle of reflection = 0°

Which of the following is a necessary condition for total internal reflection?

• A) The angle of incidence in the rarer medium must be greater than the critical angle.
• B) The angle of incidence in the denser medium must be greater than the critical angle.
• C) The angle of incidence in the denser medium must be less than the critical angle.
• D) The angle of reflection in the denser medium must be greater than the critical angle.

The special theory of relativity treats the problem involving:

• A) Accelerated frames
• B) Inertial frames
• C) Any of these
• D) Non inertial frames

which of the following is the difference between sound and light waves:

• A) sound is not subject to diffraction
• B) sound is a torsional wave rather than a longitudinal wave
• C) sound is a longitudinal wave rather than a transverse wave
• D) sound does not require energy for its origin

Which law or principle says that every point on a wave front may be considered a new wave source?

• A) Huygens’s Principle
• B) Snell's Law
• C) Superposition Principle
• D) Braggs law

In special relativity, the factor (γ) becomes significant as:

• A) Acceleration of the object approaches the speed of light
• B) Speed of the object approaches the speed of light
• C) Independent from the speed of the object
• D) Speed of the object approaches zero

As compared to the distance measured by an observer on Earth, the distance from Earth star measured by an observer in a moving spaceship would seem:

• A) Same
• B) Much larger
• C) Smaller
• D) Larger

Bending of light around the edges of an obstacle called:

• A) Refraction
• B) Interference
• C) Polarization
• D) Diffraction

Due to relative motion of observer and the frames of reference of events, time always:

• A) Continuous itself
• B) Stretches itself
• C) Contracts itself
• D) Statics itself