The index of refraction ranges from approximately 1.45 - 2 for visible materials and 1.38 - 4 for IR materials. In many cases, index of refraction and density share a positive correlation, meaning IR materials can be heavier than visible materials; however, a higher index of refraction also implies diffraction-limited performance can be achieved with fewer lens elements – reducing overall.

Answer: 1. (a) Nucleus, (b) Mitochondria. 2. If the organisation of a cell is destroyed due to some physical or chemical influence, then cell will not be able to perform the cellular functions like respiration, nutrition, excretion, and may result in its death. 3.

41.8 K Users 10 Questions 10 Marks 7 Mins Start Now Detailed Solution Download Solution PDF Concept: Machining of metals and formation of chips Types of chip: Discontinuous chips – Formed during machining of brittle materials and while machining ductile materials at low speed. Favorable conditions for this are: Brittle workpiece

The most abundant material in the plant cell wall is ADVERTISEMENT Text Solution A Lignin B Hemicellulose C Starch D Cellulose Answer The correct Answer is D Answer Step by step video & text solution for The most abundant material in the plant cell wall is by Biology experts to help you in doubts & scoring excellent marks in Class 11 exams.

The two most abundant polysaccharides of plant cell walls, cellulose and hemicellulose, are synthesized in different compartments by significantly different processes. Cellulose, generally the most abundant component in secondary cell walls (see Figure 1 ), is synthesized at the plasma membrane by a complex machinery that we are just beginning.

Light transmitting materials. Materials that are light-permeable are usually called ‘trans­parent’ or translucent’, although it might be more accurate to call them ‘diaphanous’ – of such fine texture as to allow light to pass through; translucent or transparent (from dia-, ‘through’+ phainen,‘to show, to appear’).

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Bell Jar Experiment 3 mins read Important Questions Describe an activity to show that sound requires a material medium for its propagation. Medium View solution Choose the correct answer. Sound can travel through Hard View solution Sound waves cannot travel through Medium View solution