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Which alloy is used for red, orange and yellow LED’s?

Which alloy is used for red, orange and yellow LED’s? Correct Answer (AlGaInP) Aluminum gallium indium phosphide

(AlGaInP) Aluminum gallium indium phosphidealloy is used for red, orange and yellow LED’s. Colour emitted by an LED depends on the type of Semiconductor materials used and also the proportion of the semiconductors used in the alloy.

Related Questions

Below is the list of colors nominated as the favorite colors by students of class I. Determine the color which has frequency 9. red, blue, red, yellow, green, yellow, green, yellow, yellow, red, green, red, blue, red, yellow, red, blue, yellow, red, blue, blue, yellow, yellow, green, green
Directions: Seven different boxes A, B, C, D, E, F and G of different colours viz., Orange, Pink, Purple, Yellow, Blue, Red and Green are arranged one above the other. The box at the bottom of arrangement is numbered 1, the above box is numbered 2 and so on. B is immediately above E. More than two boxes are above the Orange box. The Yellow box is immediately below A. Only one box is between the Orange box and F. G is immediately above the Red box. Only one box is between B and the Pink box. Only two boxes are between the Pink and the Green box. Only two boxes are between the Yellow box and the Orange box. The Purple box is neither at the top nor at the bottom of the arrangement.B is above Pink box. C is immediately above F. Neither C nor G is a Yellow box. G is not a Orange box. Question: Which combination represents the position of C and its colour?
There are six beads of different color Black, White, Red, Pink, Orange and Yellow to make bracelet. Red is not at any ends. Black bead is immediate left of white bead. Orange bead has only one bead near to it. No bead is there in between white and orange. Pink bead is in between yellow and red bead. How many beads are there between Orange and Pink?
Seven boxes of colours Violet, Indigo, Blue, Green, Yellow, Orange, and Red and kept in a shop one above the other but not necessarily in the same order. The green box is at the bottommost position. Four boxes are kept between Blue and Yellow where blue is above yellow. Only the Indigo box is between the Violet and Yellow box. The orange box is in the second position from the top. What is the position of the Red box from the top?
Five boys B1, B2, B3, B4 and B5 like any one colour out of the five different colours: red, yellow, green, orange and pink. Each of them has one bike out of five bikes: L, M, N, P and T. None of them likes the same colour and none of them has the same bike. The boy who likes orange has bike P. B2 has bike M and he likes green colour. B1 likes the colour red or yellow and has bike L. B4 likes either red or yellow. B5 has either N or T bike. Which of the following combination of Bike – Colour – Boy can be correct?
Consider the following question and statements and decide which of the statements is sufficient to answer the question. There are seven balls of different size and colors: green yellow, blue, orange, red, pink and black. What is the order of the balls from largest to smallest? Statements: 1. The red ball is larger than the green ball. 2. The pink ball is the smallest. 3. The blue ball is the largest. 4. The green ball is larger than the yellow ball. 5. The yellow ball is larger than the orange and black balls.
Consider the following question and statements and decide which of the statements is sufficient to answer the question. There are seven balls of different size and colors: green, yellow, blue, orange, red, pink and black. What is the order of the balls from largest to smallest? Statements: 1. The red ball is larger than the green ball. 2. The pink ball is the smallest. 3. The blue ball is the largest. 4. The green ball is larger than the yellow ball. 5. The yellow ball is larger than the orange and black balls. 
M, N, O, P and Q are sitting around a circular table. Some are facing inside, and some are facing away from the center. All of them like different colors such as Red, Blue, Yellow, Orange and Pink. M does not like Orange and Pink. P faces outside and likes Blue. Q’s neighbors are facing inside, opposite to that of Q. O does not sit adjacent to P. O likes Red color. Q sits second to the right of P. The person who likes Orange color sits to the left of Q. What is the position of Q with respect to N?
In the question below are given some statements followed by some conclusions based on those statements. Assume the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements. Statements: I. Some red are yellow. II. No yellow is pink. III. No pink is white. Conclusions: I. No white is red. II. Some yellow are red. III. Some pink are not yellow.
Three statements are given, followed by four conclusions numbered I, II, III and IV. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: Some yellow are pink. Some pink are blue. All yellow are red. Conclusions: I. Some red are pink. II. Some pink are yellow. III. Some blue is yellow. IV. Some red is blue.