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Making a simple reflecting telescope
A simple reflecting telescope can be made from a concave mirror obtained from a shaving mirror. The mirror is arranged wooden box of suitable size in such a way that it can be tilted at dissimilar angles. An upright made of wood is attached to the box so that its angle may also be varied. Two short focus lenses are fixed in corks which are then placed in a short length of mailing tube as an eye-piece. Then join this eye- piece attached to the wood upright exactly at the focal
Political role of communication Communication has an Important role in political and social awakening. During our freedomstruggle, the leaders communicated with the people di
what re yellow and blind spot
Heaping water up in a glass Place a drinking glass in a shallow pan or on a saucer. Rub the top edge of the glass with a dry cloth. Pour water into the glass unless it is full
Explain Factors Regulating Blood Pressure Blood pressure regulating mechanisms may be classified into two categories: a) Short term regulating mechanisms, which regulate an
Requirements Screw driver - 1 Wire stripper - 1 6/16 A Plug -1 Electrical appliance (any, without plug) - 1
Does a piece of glass reflect more light than a piece of paper?
What causes winds? An uneven heating of the Earth's surface causes winds. On being heated, air becomes lighter and rises up. As a result, a region of low pressure is created. Th
Define pus - abnormal constituent of urine Pus: Pus cells are found in the urine in infections of urinary tract. Pus is actually a viscous, yellowish-white fluid formed in infe
Explain Isoelectric pH Isoelectric pH: Many ionizable groups are present in a protein molecule. Depending on the pH of the medium, some of these groups act as proton
what are the causes of volcanic eruption ?
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