Question
Which one of the following causes small air bubbles in
water, which is stored in a glass vessel, to appear to shine with a silvery luster? Directions : Each of the following five items consists of a word in capital letters, followed by four words or groups of words. Select the word or group of words that is most similar in meaning to the word in capital letters.Solution
The reason why the air bubble shines in water is because of the total internal reflection. • Total internal reflection is a phenomenon in which light travels back in the same medium or reflects back. It occurs when light travels from an optically denser to a rarer medium. • This happens in an air bubble in water when light travels from water to air and back out. This creates the shine or the silvery lustre. Hence option D is correct.
A baker has four different varieties of cookies in quantities of 540, 720, 810, and 630. He wishes to pack these cookies such tha...
HCF of two numbers 70 and 140 can be expressed in the form of (20m – 110) whereas LCM of these two numbers can be expressed in the form of (40n – 20...
Find the range of the given data:
99, 101, 85, 90, 112, 87, 95
In a school, 68 boys and 119 girls have been divided into the largest possible equal classes, so that each class of boy numbers the same as each class o...
Rs. 21,000 is split between 'P', 'Q', and 'R' such that one-third of P’s share equals 25% of Q’s share, and equals one-seventh of R’s share. Find ...
The HCF of two numbers is 12. Which one of the following can never be their LCM?
The smallest number which when divided by 28 and 32 leaves remainder 12 and 16 respectively is:
The length of a width is 20 cm and the side of a square is 24 cm less than the length and width of the rectangle. If perimeter of the rectangle is 30 c...
A invested Rs. X in a business. After four months B Joined him with Rs. 7X and A double his investment. If at the end of the years total profit is Rs. 4...
Relevant for Exams:
