Question Answers

Focal length of the plano-convex lens is 15 cm. A small object is placed at A as shown in figure. The plane surface is silvered. The image will form at Focal length of the plano-convex lens is 15 cm. A small object is placed at A as shown in figure. The plane surface is silvered. [...]

3.Population of Rajasthan = 570 lakhs and population of U.P. = 1660 lakhs. Area of Rajasthan = 3 lakh km^2 and area of U.P. = 2 lakh km^2. (i) How many people are there per km^2 in both states? (ii) Which state is less populated? 1. Find the ratio of: (a) Rs. 5 to 50 [...]

2.In a computer lab, there are 3 computers for every 6 students. How many computers will be needed for 24 students? 2.In a computer lab there are 3 computers for every 6 students. How many computers will be needed for 24 students? October 8, 2020 Category: Chapter 8 - Comparing Quantities , Maths , NCERT [...]

1. Find the ratio of: (d) 30 days to 36 hours 1. Find the ratio of: (d) 30 days to 36 hours October 8, 2020 Category: Chapter 8 - Comparing Quantities , Maths , NCERT Class 7 ,

1. Find the ratio of: (c) 9 m to 27 cm 1. Find the ratio of: (c) 9 m to 27 cm October 8, 2020 Category: Chapter 8 - Comparing Quantities , Maths , NCERT Class 7 ,

1. Find the ratio of: (b) 15 kg to 210 g 1. Find the ratio of: (b) 15 kg to 210 g October 8, 2020 Category: Chapter 8 - Comparing Quantities , Maths , NCERT Class 7 ,

The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex as formed by a convex lens of focal length 30 cm is 2 cm. If [...]

A hollow double concave lens is made of very thin transparent material. It can be filled with air or either of two liquids L1 and L2 having refractive indices mu 1 and mu 2 respectively A hollow double concave lens is made of very thin transparent material. It can be filled with air or either [...]

Figure shows an object and its image formed by a thin lens. Then the nature and focal length of lens is Figure shows an object and its image formed by a thin lens. Then the nature and focal length of lens is October 8, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP [...]

A fish in a lake (refractive index 4/3 for water) is viewed through a convex lens. From water surface, the lens is placed in air at half of the distance of the fish from the water surface, A fish in a lake (refractive index 4/3 for water) is viewed through a convex lens. From water [...]