Question Library

A boy receives the echo of his clap reflected by a nearby hill 0.8s later. How far is he from the hill? [ speed of sound in air = \(340ms^{-1}\)

The focal length of a concave mirror is 2.0cm. If an object is placed 8.0cm from it, the image is at

In a compound microscope, the objective and the eye piece focal lengths are

Which gas produces a red coloured light in a discharge tube?

A wave that travels through stretched strings is known as

A transverse wave and a longitudinal wave travelling in the same direction in a medium differ essentially in their

If a sonometer has a fundamental frequency of 450HZ, what is the frequency of the fifth overtone?

If the linear magnification of the objective and eyepiece convex lenses of a compound microscope are 4 and 7 respectively. Calculate the angular magnification of the microscope

The angle of deviation of light of various colours passing through a triangular prism increases in the order

The particle nature of light is demonstrated by the

The equation of a wave traveling in a horizontal direction is expressed as y = 15 sin \(\frac{2\pi}{5}\) (60t - x). What is its wavelength?

The characteristic of a vibration that determines its intensity is the

Where can a man place his face to get an enlarged image when using a concave mirror to shave?

The magnification of an object 2cm tall when placed 10cm in front of a plane mirror is

After reflection from the concave mirror, rays of light from the sun converges