What is the phenomenon where a wave changes direction as it passes through a medium with a different density?
Reflection
Diffraction
Refraction
Interference
Correct Answer :
C. Refraction
Related Questions
What is the phenomenon where light waves oscillate in multiple planes?
Polarization
Diffraction
Dispersion
Interference
Which of the following is an example of a vector quantity?
Mass
Speed
Distance
Velocity
What is the phenomenon where light waves oscillate in a single plane?
Polarization
Diffraction
Interference
Dispersion
Which law states that the total entropy of an isolated system can never decrease over time?
First Law of Thermodynamics
Second Law of Thermodynamics
Third Law of Thermodynamics
Law of Conservation of Mass
What is the process by which a liquid changes into a gas below its boiling point?
Evaporation
Vaporization
Condensation
Sublimation
Which law states that for every action, there is an equal and opposite reaction?
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
Law of Universal Gravitation
Which type of mirror can form both real and virtual images?
Concave mirror
Convex mirror
Plane mirror
Spherical mirror
Which type of electromagnetic wave has the highest frequency?
Gamma rays
Radio waves
X-rays
Microwaves
What is the phenomenon where a wave combines with another wave to produce a wave with greater amplitude?
Reflection
Diffraction
Refraction
Constructive interference
Which of the following statements about electric fields is true?
Electric fields always point towards positive charges.
Electric fields are vectors and have both magnitude and direction.
Electric fields only exist inside conductors.
Electric fields do not interact with magnetic fields.
Which of the following is a non-contact force?
Friction
Tension
Gravity
Magnetic force
What is the SI unit of half-life in radioactive decay?
Second
Year
Joule
Becquerel
What is the SI unit of magnetic flux in the CGS system?
Weber
Gauss
Tesla
Henry
Which law states that the total momentum of an isolated system remains constant if no external forces act on it?
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
Law of Conservation of Momentum
What is the wavelength range of visible light?
100 nm - 400 nm
400 nm - 700 nm
700 nm - 1000 nm
1 mm - 10 mm
Which of the following statements about wave speed is true?
It is determined by frequency and wavelength.
It is independent of the medium through which the wave travels.
It is inversely proportional to amplitude.
It is a scalar quantity.
Which type of particle is negatively charged and orbits the nucleus of an atom?
Electron
Proton
Neutron
Positron
What is the SI unit of intensity of sound?
Watt per square meter
Decibel
Hertz
Pascal
Which law states that the pressure of a gas is directly proportional to its absolute temperature at constant volume?
Boyle's Law
Charles's Law
Gay-Lussac's Law
Avogadro's Law
What is the phenomenon where a wave changes direction as it passes through a medium with a different density?
Reflection
Diffraction
Refraction
Interference
Which of the following statements about nuclear fusion is true?
It releases energy when light nuclei combine to form heavier nuclei.
It is the process that powers stars.
It is a type of radioactive decay.
It involves the emission of beta particles.
What is the SI unit of magnetic susceptibility?
No unit (dimensionless)
Tesla per meter
Ampere per meter
Weber
Which of the following statements about gravity is true?
It is a contact force.
It is a repulsive force.
It is a conservative force.
It only acts on planets and stars.
What is the SI unit of angular momentum?
Kilogram-meter per second
Joule-second
Newton-meter
Hertz
What is the SI unit of electric charge in the CGS system?
Statcoulomb
Coulomb
Ampere-hour
Franklin
What is the SI unit of magnetic field strength?
Tesla
Weber
Gauss
Ampere
What is the phenomenon where a wave is partially deflected and partially absorbed by a surface?
Reflection
Diffraction
Refraction
Absorption
What is the SI unit of frequency in the CGS system?
Hertz
Rad/s
Cycles per second
Revolutions per minute
Which of the following is a fundamental particle found in the nucleus of an atom?
Neutron
Electron
Proton
Photon
What is the acceleration due to gravity on the surface of the Earth?
9.8 m/s²
6.67 × 10^-11 Nm²/kg²
3.00 × 10^8 m/s
1.6 m/s²