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.Convex

2.Plane mirror

3.Concave mirror

4.Spherical mirror

Question 1 of 20

Question 2 of 20

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

1.Its direction

2.Its wavelength

3.Its speed

4.Its frequency

Question 2 of 20

Question 3 of 20

3. The focal length of a spherical mirror is:

1.R/2

2.R

3.None of these

4.2R

Question 3 of 20

Question 4 of 20

4. The index of refraction depends upon:

1.The image distance

2.The focal length

3.The object distance

4.The speed of light

Question 4 of 20

Question 5 of 20

5. Focal length of the concave mirror is:

1.Smaller

2.Positive

3.Greater

4.Negative

Question 5 of 20

Question 6 of 20

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

1.Imagination

2.Mirage

3.Mirror

4.Magnification

Question 6 of 20

Question 7 of 20

7. Linear magnification:

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

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

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

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

Question 7 of 20

Question 8 of 20

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

1.Upright and real

2.Inverted and real

3.Upright and virtual

4.Inverted and virtual

Question 8 of 20

Question 9 of 20

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

1.0.5 cm

2.15 cm

3.20 cm

4.7.5 cm

Question 9 of 20

Question 10 of 20

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

1.Double

2.Negative

3.Positive

4.Half

Question 10 of 20

Question 11 of 20

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

1.Beyond the center of curvature

2.Between the center of curvature and the focal point

3.Center of curvature

4.At the focal point

Question 11 of 20

Question 12 of 20

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

1.Radius

2.Principal axis

3.Focal length

4.Virtual focus

Question 12 of 20

Question 13 of 20

13. 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.Refract only

2.Reflect only

3.Partially refract and partially reflect

4.Diffract only

Question 13 of 20

Question 14 of 20

14. Focal length of a concave lens is:

1.Greater

2.Smaller

3.Positive

4.Negative

Question 14 of 20

Question 15 of 20

15. 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?

1.4.1 cm

2.9.9 cm

3.8.2 cm

4.20 cm

Question 15 of 20

Question 16 of 20

16. 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 16 of 20

Question 17 of 20

17. Image formed on a camera is:

1.Virtual, upright and diminished

2.Real, inverted and magnified

3.Real, inverted and diminished

4.Virtual, upright and magnified

Question 17 of 20

Question 18 of 20

18. Diameter of a spherical mirror is called:

1.Aperture

2.Radius of curvature

3.Center of curvature

4.Focal length

Question 18 of 20

Question 19 of 20

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

1.Virtual, erect, diminished

2.Real, erect, same size

3.Real, inverted, diminished

4.Virtual, inverted, magnified

Question 19 of 20

Question 20 of 20

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

1.The reflected rays actually pass through it

2.The reflected rays do not pass through it

3.Prism has been placed before principal focus

4.None of these

Question 20 of 20

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