The apparent depth of a needle lying at the bottom of the tank, which is filled with…
Physics · Class 12 · CBSE — Ray Optics & Optical Instruments
The apparent depth of a needle lying at the bottom of the tank, which is filled with water of refractive index 1.33 to a height of 12.5 cm is measured by a microscope to be 9.4 cm. If water is replaced by a liquid of refractive index 1.63 upto the same height.
What distance would the microscope have to be moved to focus on the needle again?
- 1.73 cm
- 2.13 cm
- 1.5 cm
- 2.9 cm
Answer
(A) 1.73 cm
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- A giant refracting telescope at an observatory has an objective lens of focal length 15 m. If an eye piece of…
- Two lenses of focal lengths 20 cm and −40 cm are held in contact. The image of an object at infinity will be…
- Which of the following forms a virtual and erect image for all positions of the object?
- A thin convex lens of focal length 25 cm is cut into two pieces 0.5 cm above the principal axis. The top part…
- Which of the following pairs of media has the least value of critical angle?
- A biconvex lens of glass having refractive index 1.47 is immersed in a liquid. It becomes invisible and…
- The focal length of the lenses of an astronomical telescope are 50 cm and 5 cm. The length of the telescope…
- Assertion (A): Plane and convex mirrors cannot produce real images under any circumstance. Reason (R): A…
More Ray Optics & Optical Instruments questions · Browse all practice questions