What distinguishes a semiconductor from an insulator

Reference no: EM13543678

An LED’s color is determined by the energy needed to shift an electron across the band gap in the semiconductor from which the LED is made. Because blue photons have more energy than green photons, the development of blue LEDs has been slow. The materials needed to produce blue LEDs are almost true insulators rather than semiconductors. What distinguishes a semiconductor from an insulator?

Reference no: EM13543678

Questions Cloud

Determine what is the rods angular velocity : A 750g, 50-cm-long metal rod is free to rotate about a frictionless axle at one end. What is the rod's angular velocity immediately after the blow

What is tension in the string once the box begins to move : A 5.3kg box is on a frictionless 36^\circ slope and is connected via a massless string over a massless, frictionless pulley to a hanging 1.6kg weight. A- What is the tension in the string if the 5.3kg box is held in place, so that it cannot move? B- ..

Find the absolute pressure at the bottom of a freshwate lake : Calculate the absolute pressure at the bottom of a freshwater lake at a point whose depth is 26.2 m

Find the recoil speed of the man and rifle : A rifle with a weight of 20 N fires a 3.5-g bullet with a speed of 250 m/s. (a) Find the recoil speed of the rifle. Incorrect: Your answer is incorrect. Your response differs from the correct answer by more than 10%. Double check your calculations. m..

What distinguishes a semiconductor from an insulator : An LED’s color is determined by the energy needed to shift an electron across the band gap in the semiconductor from which the LED is made. Because blue photons have more energy than green photons, the development of blue LEDs has been slow. The mate..

Determine where does this maximum speed occur : A 3.60-kg object is attached to a spring and placed on frictionless, horizontal surface. A horizontal force of 9.0 N is required to hold the object at rest when it is pulled 0.200 m from its equilibrium position, Where does this maximum speed occur

Calculate the period and amplitude of the motion : In an engine, a piston oscillates with simple harmonic motion so that its position varies according to the expression, x = 3.00 cos 5t + ? 5, Find the period and amplitude of the motion

What is the magnitude of the force that the shopper exerts : A person pushes a 16.2-kg shopping cart at a constant velocity for a distance of 27.5 m on a flat horizontal surface. She pushes in a direction 32.3 ° below the horizontal. A 35.3-N frictional force opposes the motion of the cart. (a) What is the mag..

Calculate the angular acceleration of the blades : A ceiling fan is turned on and a net torque of 1.8 N·m applied to the blades. What is the angular acceleration of the blades

User Account

All Pages