Question

1. Calculate the power of concave lens of focal length 2 m.

2. You are given kerosene (1.44), turpentine oil (1.47) and water (1.33). In
which of these does the light travels fastest.

3. The refractive index of diamond is 2.42. What is the meaning of this
statement?

4. Where should an object be placed in front of convey lens to get a real image of same size as object?​

Answer 1

Answer:

1.-0.5D 2.water 3.the speed of light in diamond is 2.42 times smaller than the speed of the light in vacuum 4.at 2f