Refraction of Light
Refraction is a change in the direction of light rays when they travel from one medium to another. It is the bending of light when it goes through different media.
Angle of Refraction
Light is considered by many scientists to have dual nature, both particle nature and wave nature. First, Particle nature is one in which we consider a stream of packets of energy called photons. Second, Wave nature is considering light as electromagnetic radiation whereas part of it is perceived by humans. Visible spectrum defined by humans lies in a range of 400 to 700 nm wavelengths.
Index of Refraction of Diamond
Diamond, the world’s hardest naturally occurring material and mineral known, is a solid form of the element carbon. The atoms are arranged in a crystal structure called diamond cubic. They exist in a huge variety of colours. Also, they are one of the best conductors of heat and have a very high melting point.
The current that flows through a battery-powered flashlight, solar cells and fuel cells is called ____.
A. AC B. DC C. LC D. RC
A beam of white light goes from air into the water droplet at an incidence angle of 36.2 degrees. What is the angle
between the red (660 nm) and violet (410 nm) parts of the refracted light?
A. 20O B. 21O C. 22O D. 23O
A magnetic field B= 0.6T is directed upward through a circular loop of diameter 7 cm and 500 turns. The loop is initially
horizontal, so it is perpendicular to the magnetic field. It rotates through a horizontal axis so that the plane of the loop
is at 74° with the horizontal axis within 1 second. What is the magnitude of the induced emf?
A. -18.18 V B. -15.3 V C. 16.4 V D. 17.6 V
A electron passes through a magnetic field at 60 to the field at a velocity of 3.5 × 106?/?. What is the magnitude of
the force acting on the electron having a 0.45 T magnetic field?
A. 2. 18 × 10−10 ? C. 2. 18 × 10−12 ?
B. 2. 18 × 10−11 ? D. 2. 18 × 10−13 ?
A wire that is 2.00 m long and carrying a current of 15.0 A is at 90 to a uniform magnetic field. The force acting on
the wire is 0.70 N. What is the strength of the magnetic field?
A. 0.01 T B. 0.02 T C. 0.03 T D. 0.04 T
Which of the following statements BEST describes the difference between electric and magnetic fields?
I. An electric field is essentially a force field that’s created around an electrically charged particle. A magnetic
field is one that’s created around a permanent magnetic substance or a moving electrically charged object.
II. The strength of the magnetic field is represented by either gauss or Tesla. The strength of an electric field is
represented by Newton per Coulomb or Volts per Meter
III. Magnetic fields are created whenever there is a flow of
voltage is present
A. I and II B. II and III C. I, II, and III D. I and III
Compute the resistance of a hardened copper rod 2 meters long and 8 mm in diameter if the resistivity of the material
is 1.756 x 10-8 ohm-meter.
A. 1.69 x 10-4 Ω.m B. 6.19 x 10-4 Ω.m C. 8.61 x 10-4 Ω.m D. 9.18 x 10-4 Ω.m
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