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The image of a candle is produced by a convex lens on a screen. The lower half of the lens is painted black to make it completely opaque. Illustrate the ray diagram to show the ima
The velocity with which the group of waves travels is called as group velocity or the velocity with which a ray packet goes is called as group velocity
A light object moves faster Mark off a half-metre on a table top with chalk. Separate this equally into centimetres. Secure a long rubber band and two spring clothes pegs. Atta
A ball dropped from a balloon at rest clears a tower 81m high during the last quater second of its journey. Find the height of the balloon and the velocity of the body when it rea
Brass: When copper is alloyed zinc (60% copper, 40% zinc) is called brass. It is widely used as a current carrying and structural material in switches and plugs etc. Propertie
How does the distance between fringes in Young's double slit experiment change. a) If the colour of the light is changed from red to blue? b) If the slit separation is incre
Potential barrier One either side of the junction, the region ‘D' becomes free from mobile charge carriers. That is on n-type side of D, no free electrons exist and on p-type s
VANDER WAALS BOND: A fourth type of bonding, which does not involve a transfer or sharing of electrons, is known as the Vander walls bond. It forms in atoms or molecules that b
The earth "spins" (rotates) on its axis based on the action of the materials that accreted to form it, and also on any large collisions it might have undergone. Like the one in the
A thin rod of length 1 m is fixed in a vertical position inside a train, which is moving horizontally with constant acceleration 4 m/s2. A bead can slide on the rod, and friction c
Let the half distance of the Total circle be 3x A at the speed of V covers x distance and B at the speed of 2V covers 2x distance and thus partial distance of 3x at 2minutes, again if they run opposite they have to cover 6x distance to meet each other i.e if A covers x distance B covers 2x distance and so onFinally x + 2x + x + 2x = 6x3x at 2 minute6x at 4 minute whether I am right
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