Question
Consider the following statements regarding the
‘Tyndall effect’. 1. It is a phenomenon wherein scattering of a beam of light can be observed. 2. It can be observed when a fine beam of light enters a room through a small hole. 3. It can be observed when sunlight passes through the canopy of a dense forest. Which of the statements given above is/are correct?Solution
The correct answer is D
Which of the following instruments is used to measure humidity?
Velocity of the sound is minimum in-
The waves which are less than 20Hz are known asÂ
Pulsars are :
What term describes the resistance of an object to changes in its state of motion or rest?
S.I unit of Luminous Intensity is
Which of the following determines the loudness or softness of the sound?
Water gets cooled, when ice is immersed in it. It is because of the phenomenon of
What is the minimum distance required for an obstacle to produce a distinct echo?
Temperature of the Sun is measured by?