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

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Question 1 of 20

Physics

1. Diameter of a spherical mirror is called:

1.Radius of curvature

2.Center of curvature

3.Focal length

4.Aperture

Question 1 of 20

Question 2 of 20

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

1.Prism has been placed before principal focus

2.The reflected rays do not pass through it

3.None of these

4.The reflected rays actually pass through it

Question 2 of 20

Question 3 of 20

3. Linear magnification:

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

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

Question 3 of 20

Question 4 of 20

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

1.Upright and real

2.Inverted and virtual

3.Upright and virtual

4.Inverted and real

Question 4 of 20

Question 5 of 20

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

1.Radius

2.Focal length

3.Principal axis

4.Virtual focus

Question 5 of 20

Question 6 of 20

6. 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.At the focal point

3.Center of curvature

4.Between the center of curvature and the focal point

Question 6 of 20

Question 7 of 20

7. 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 7 of 20

Question 8 of 20

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

1.Mirage

2.Magnification

3.Imagination

4.Mirror

Question 8 of 20

Question 9 of 20

9. 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.Refract only

3.Diffract only

4.Reflect only

Question 9 of 20

Question 10 of 20

10. Image formed on a camera is:

1.Real, inverted and diminished

2.Real, inverted and magnified

3.Virtual, upright and diminished

4.Virtual, upright and magnified

Question 10 of 20

Question 11 of 20

11. The focal length of a spherical mirror is:

1.R

2.R/2

3.None of these

4.2R

Question 11 of 20

Question 12 of 20

12. 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

3.20 cm

4.8.2 cm

Question 12 of 20

Question 13 of 20

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

1.Real, erect, same size

2.Virtual, erect, diminished

3.Virtual, inverted, magnified

4.Real, inverted, diminished

Question 13 of 20

Question 14 of 20

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

1.Concave mirror

2.Spherical mirror

3.Convex

4.Plane mirror

Question 14 of 20

Question 15 of 20

15. Focal length of a concave lens is:

1.Greater

2.Negative

3.Positive

4.Smaller

Question 15 of 20

Question 16 of 20

16. Focal length of the concave mirror is:

1.Smaller

2.Greater

3.Negative

4.Positive

Question 16 of 20

Question 17 of 20

17. The index of refraction depends upon:

1.The image distance

2.The speed of light

3.The object distance

4.The focal length

Question 17 of 20

Question 18 of 20

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

1.Its speed

2.Its frequency

3.Its wavelength

4.Its direction

Question 18 of 20

Question 19 of 20

19. 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 reflected

2.Partially reflected and partially transmitted

3.Totally transmitted

4.Be absorbed

Question 19 of 20

Question 20 of 20

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

1.Double

2.Positive

3.Negative

4.Half

Question 20 of 20

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