AP EAPCET 2022 - 5th July Morning Shift | Ray Optics Question 20 | Physics

A needle is lying at the bottom of a water tank of height 12 cm. The apparent depth of the needle measured by a microscope is 9 cm . If the water is replaced by a liquid of refractive index of 1.5 of same height, the distance through which the microscope has to be moved to focus the needle again is

1.2 cm

1.1 cm

1 cm

1.33 cm

AP EAPCET 2022 - 4th July Evening Shift

MCQ (Single Correct Answer)

-0

The radii of curvature of a double convex lens are 4 cm and 8 cm . If the refractive index of the material of the lens is 1.5 , the focal length of the lens is nearly.

16 cm

12.11 cm

7.33 cm

5.33 cm

AP EAPCET 2022 - 4th July Morning Shift

MCQ (Single Correct Answer)

-0

A ray is incident from a medium of refractive index 2 into a medium of refractive index 1. The critical angle is

$$30^\circ$$

$$60^\circ$$

$$45^\circ$$

$$90^\circ$$

AP EAPCET 2021 - 20th August Evening Shift

MCQ (Single Correct Answer)

-0

Assertion (A) The focal length of lens does not change when red light is replaced by blue light.

Reason (R) The focal length of lens does not depend on colour of light used.

Both $$A$$ and $$R$$ are true and $$R$$ is a correct explanation for $$A$$.

Both $$A$$ and $$R$$ are true but $$R$$ is not a correct explanation for $$\mathrm{A}$$.

$$A$$ is true, $$R$$ is false.

Both $$A$$ and $$R$$ are false.

PREVIOUS NEXT

AP EAPCET Subjects

Browse all chapters by subject