NEET Physics: Questions 1276 - 1279 of 2099
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2099 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.
Rs. 550.00 or
Question number: 1276
Question number: 1277
In Young’s experiment, the fringe width for dark fringes is same as that for white fringes.
In Young’s double slit experiment performed with a source of white light, only black and bright fringes are observed.
|a.||Ꭺ is false but Ꭱ is true|
|b.||Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ|
|c.||Both Ꭺ and Ꭱ are false|
|d.||Ꭺ is true but Ꭱ is false|
Question number: 1278
A rod of length 20 cm is made of metal. It expands by 0.075 cm when its temperature is raised from 0°C to 100°C. Another rod of a different metal B having the same length expands by 0.045 cm for the same change in temperature. A third rod of the same length is composed of two parts, one of metal A and the other of metal B. This rod expands by 0.060 cm for the same change in temperature. The portion made of metal A has the length