Punjab 10th Class Physics Chapter 3 Geometrical Optics Mcqs Test Online

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Question 1 of 20

Physics

1. If the outer curved surface of a mirror is reflecting, then it is called:

1.Concave mirror

2.Spherical mirror

3.Plane mirror

4.Convex

Question 1 of 20

Question 2 of 20

2. Linear magnification:

1.Is the ration of the distance of the image and object from the mirror

2.Is the ratio of the distance of object and image from the focal point

3.Is the ration of the distance of image from object and the distance of object from the mirror

4.Is the ration of the distance of object to image distance from mirror

Question 2 of 20

Question 3 of 20

3. Which type of image is produced by the converging lens of human eye if it views a distant object?

1.Real, inverted, diminished

2.Real, erect, same size

3.Virtual, erect, diminished

4.Virtual, inverted, magnified

Question 3 of 20

Question 4 of 20

4. The principal focus of a concave mirror is real because:

1.None of these

2.Prism has been placed before principal focus

3.The reflected rays actually pass through it

4.The reflected rays do not pass through it

Question 4 of 20

Question 5 of 20

5. Focal length of the concave mirror is:

1.Negative

2.Smaller

3.Positive

4.Greater

Question 5 of 20

Question 6 of 20

6. Diameter of a spherical mirror is called:

1.Center of curvature

2.Focal length

3.Aperture

4.Radius of curvature

Question 6 of 20

Question 7 of 20

7. If a ray of light in glass is incident on an air surface at an angle greater than the critical angle, the ray will:

1.Partially refract and partially reflect

2.Reflect only

3.Refract only

4.Diffract only

Question 7 of 20

Question 8 of 20

8. If the image is virtual, then its distance from lens is taken:

1.Negative

2.Positive

3.Half

4.Double

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Question 9 of 20

9. The index of refraction depends upon:

1.The focal length

2.The object distance

3.The image distance

4.The speed of light

Question 9 of 20

Question 10 of 20

10. An object is placed at the center of curvature of a concave mirror. This image produced by the mirror is located:

1.Center of curvature

2.Beyond the center of curvature

3.Between the center of curvature and the focal point

4.At the focal point

Question 10 of 20

Question 11 of 20

11. Image formed on a camera is:

1.Real, inverted and diminished

2.Virtual, upright and magnified

3.Virtual, upright and diminished

4.Real, inverted and magnified

Question 11 of 20

Question 12 of 20

12. The focal length of a spherical mirror is:

1.R/2

2.2R

3.R

4.None of these

Question 12 of 20

Question 13 of 20

13. If a ray of light in glass in incident on an air surface at an angle greater than the critical angle, the ray will:

1.Totally transmitted

2.Totally reflected

3.Be absorbed

4.Partially reflected and partially transmitted

Question 13 of 20

Question 14 of 20

14. Which of the following quantities is not changed during refraction of light?

1.Its frequency

2.Its speed

3.Its wavelength

4.Its direction

Question 14 of 20

Question 15 of 20

15. Which type of image is formed by a concave lens on a screen?

1.Inverted and virtual

2.Inverted and real

3.Upright and virtual

4.Upright and real

Question 15 of 20

Question 16 of 20

16. An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

1.8.2 cm

2.20 cm

3.4.1 cm

4.9.9 cm

Question 16 of 20

Question 17 of 20

17. The ratio of the height of the image to an object is called:

1.Mirage

2.Mirror

3.Magnification

4.Imagination

Question 17 of 20

Question 18 of 20

18. A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?

1.20 cm

2.0.5 cm

3.15 cm

4.7.5 cm

Question 18 of 20

Question 19 of 20

19. The distance between principal focus of a convex mirror and its pole is called:

1.Focal length

2.Virtual focus

3.Principal axis

4.Radius

Question 19 of 20

Question 20 of 20

20. Focal length of a concave lens is:

1.Positive

2.Greater

3.Negative

4.Smaller

Question 20 of 20

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