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

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Question 1 of 20

Physics

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

1.Virtual, inverted, magnified

2.Real, erect, same size

3.Real, inverted, diminished

4.Virtual, erect, diminished

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 frequency

4.Its speed

Question 2 of 20

Question 3 of 20

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

1.Mirror

2.Imagination

3.Mirage

4.Magnification

Question 3 of 20

Question 4 of 20

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

1.Inverted and virtual

2.Upright and virtual

3.Inverted and real

4.Upright and real

Question 4 of 20

Question 5 of 20

5. The focal length of a spherical mirror is:

1.None of these

2.2R

3.R

4.R/2

Question 5 of 20

Question 6 of 20

6. Diameter of a spherical mirror is called:

1.Aperture

2.Center of curvature

3.Radius of curvature

4.Focal length

Question 6 of 20

Question 7 of 20

7. 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 7 of 20

Question 8 of 20

8. Image formed on a camera is:

1.Real, inverted and diminished

2.Virtual, upright and magnified

3.Real, inverted and magnified

4.Virtual, upright and diminished

Question 8 of 20

Question 9 of 20

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

1.Half

2.Positive

3.Negative

4.Double

Question 9 of 20

Question 10 of 20

10. 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?

1.9.9 cm

2.20 cm

3.4.1 cm

4.8.2 cm

Question 10 of 20

Question 11 of 20

11. Focal length of the concave mirror is:

1.Positive

2.Negative

3.Smaller

4.Greater

Question 11 of 20

Question 12 of 20

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

1.Prism has been placed before principal focus

2.None of these

3.The reflected rays do not pass through it

4.The reflected rays actually pass through it

Question 12 of 20

Question 13 of 20

13. 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

2.7.5 cm

3.15 cm

4.20 cm

Question 13 of 20

Question 14 of 20

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

1.Plane mirror

2.Convex

3.Spherical mirror

4.Concave mirror

Question 14 of 20

Question 15 of 20

15. 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.Reflect only

2.Refract only

3.Diffract only

4.Partially refract and partially reflect

Question 15 of 20

Question 16 of 20

16. Linear magnification:

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

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

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

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

Question 16 of 20

Question 17 of 20

17. The index of refraction depends upon:

1.The image distance

2.The focal length

3.The speed of light

4.The object distance

Question 17 of 20

Question 18 of 20

18. 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.Between the center of curvature and the focal point

3.Beyond the center of curvature

4.At the focal point

Question 18 of 20

Question 19 of 20

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

1.Virtual focus

2.Radius

3.Principal axis

4.Focal length

Question 19 of 20

Question 20 of 20

20. Focal length of a concave lens is:

1.Positive

2.Greater

3.Smaller

4.Negative

Question 20 of 20

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