The Doppler effect was discovered by Austrian scientist Christian Doppler in 1842, describing the change in frequency of any type of sound or light wave produced by a moving source with respect to an observer.

According to the 2011 census, Scheduled Tribes constitute 13.5 per cent of the total population of Rajasthan.

1. Decrease in bone density and strength is called osteoporosis.

2. Osteoporosis is a condition in which bones become weak and brittle.

3. Women suffer from osteoporosis more often than men.

Khadi and Village Industries Commission has recently entered into agreements with the following entities to promote Khadi products:

A. Prasar Bharati
 1. Objective: To increase awareness about Khadi products
 2. Method: Prasar Bharati will use all its media for advertising and promotion of Khadi products.

B. NBCC (India) Limited
 1. Objective: To help in the marketing of Khadi products
 2. Method: NBCC (India) Limited will use its national network to promote and sell Khadi products.

C. Digital India Corporation
 1. Objective: To develop an online marketplace for Khadi products
 2. Method: Digital India Corporation will develop an online marketplace for Khadi products.

These Mous are expected to increase the marketing and sales of Khadi products. This will boost the Khadi industry and provide employment opportunities to rural artisans.

Transfer paymentOne-way payment of money for which no money, good, or  service is received in exchange. Governments use such payments as means of income  redistribution by giving out money under social welfare  programs such as social security, old age or disability pensions,  student grants, unemployment compensation, etc. Subsidies  paid to exporters, farmers, manufacturers, however, are not  considered transfer payments. Transfer payments are excluded  in computing gross national product.