Question

1.The power of a lens is measured in ?
2. Albert Einstein was awarded Nobel Prize for his path-breaking research and formulation of the ____________
3. The instrument that measures arterial blood pressure is known as?
4. Tetraethyl lead is used as ?
5. The two elements that are frequently used for making transistors are?

Answer 1

1) dioptre (uk), or diopter (us), is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in metres.

2)law of photo electric effect.

3) sphygmomanometer

4) Tetraethyl lead organometallic compound containing the toxic metal lead that for much of the 20th century was the chief antiknock agent for automotive gasoline, or petrol.

5)silicon and germanium

hope it helped you ☺

Answer 2

1. The power of a lens is measured in dioptre or diopter.

2. Albert Einstein was awarded Nobel Prize for his path-breaking research and formulation of the Laws of Photo-Electric Effect.

3. The instrument that measures arterial blood pressure is known as Sphygmomanometer.

4. Tetraethyl lead is used as petrol additive.

5. The two elements that are frequently used for making transistors are silicon and germanium.