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Grade 11 Science English medium

Third Exam unit :5

Name: *

School: *

1. What is the position of image, when placing an object on focal length of a convex lens? *

3 points

Beyond 2 F

In infinity

Between F and 2F

At 2F

2. Which of the following doesn't occurs in convex lens? *

3 points

Option 1

Option 2

Option 3

Option 4

3. Which created a virtual image When an object is placed in front of the optical components ? *

3 points

Option 1

Option 2

Option 3

Option 4

4 .. The optical equipment shown in the given figure is *

3 points

Plane mirror

Concave lens

Concave mirror

Convex mirror

5. Which of the following give a parallel beam ? *

3 points

A,B

A,C

B,C

A,B,C

6.Which is not showing the correct path where the light falling on a concave mirror ? *

3 points

Option 1

Option 2

Option 3

Option 4

7. What are properties of images when optical equipment is placed at infront of the infinite object *

3 points

Smaller than the object , Upright

Larger than the object , Upright

Smaller than the object , Inverted

Larger than the object , Inverted

08. In a nearby picture, a semicircular glass beam placed in the air shows the cases of light emitting at different angles. What phenomena's are correct? *

3 points

Refraction of light and Reflection of light

Reflection of light and Refraction of light

Refraction of light and Total internal reflection

Reflection of light and Refraction of light and interface

09. A ray of light falls on a glass beam placed in the air as shown in the figure. What is the value of angle of refraction , when a value of incident angle is gradually increased up to 90 degrees *

3 points

Increased

Decreased

At beginning increase then decrease

Not change

10. An image of a flower vase using a device called X is shown in Figure. A case obtained on a white screen. X can be one of the following *

3 points

Plane mirror

Convex mirror

Concave lens

Convex lens

11. Which diagram showing the appearance of a total internal reflection *

3 points

12. What is the position of the image, when the object is twice as far away of the focal length in a concave mirror *

3 points

At focal length

Object Between the center of curvature and the focal length

Twice the focal length

At infinity

13. Which Optical equipment that performs a given function *

3 points

Concave mirror

Convex mirror

Concave lens

Plane mirror

14.What is the property of the Image for the given object in this case *

3 points

Can be obtained on the screen

Get a same size as the object

Get the inverted image

It works like a simple microscope

15.Which Optical equipment is shown in the below figure *

2 points

Concave mirror

Convex mirror

Concave lens

Convex lens

16. which image doesn't appears in the plane mirror *

2 points

Virtual image

Lateral inverted

Identical to the object

the distance from the image is less than the distance from the object

17. How to get the same size image *

3 points

Option 1

Option 2

Option 3

Option 4

18. As shown in the figure the light ray CA falls into the concave mirror. The path of the reflected ray is *

3 points

19 Which is showing the correct path of a single colour ray in a prism *

3 points

Option 1

Option 2

Option 3

Option 4

20.Which are used to diverge the light beams OA and OB ? *

2 points

Concave lens , Convex mirror

Concave lens , Concave mirror

Convex lens, Concave mirror

Convex lens, Plane mirror

21. What is shown as X in the figure of the concave mirror *

2 points

Is half the focal length

Is the focal length

Is the distance between the focal length and twice its distance

Is twice the focal length

22. What is the correct path of the light beam AB entering the convex lens of L *

2 points

23. What is the correct statement about the light refraction that takes place in lenses *

2 points

The convex lens makes the reality image

The concave lens converge light rays

The convex lens always creates the virtual images and smaller than the object

The rays are diverging in the convex lens

24. A beam of light falling on a glass surface at an angle of 45 degrees the light ray refracted at an angle of 28 degrees. calculate the index of refraction of glass ( sin 45 = 0.71 , sin 28=0.47 ) *

2 points

1.51

0.47

0.71

Option 5

25. When the object is placed at a distance of 6cm in front of a concave mirror, the image appears at the point where the object is placed at a distance of 6cm. Find the focal length of the concave mirror? *

2 points

12cm

9cm

6cm

3cm

26. What happen when, a light rays go from a rare medium to a dense medium *

2 points

It bend towards the normal

Refracts away from the normal

It bend towards their own path

Doesn't refracted

27. Which color that has the least deviation from the colors of light *

2 points

Red

Orange

Purple

Green

28. If a man at a distance of 8m in front of a plane mirror. that man moves 3m towards the plane mirror, Calculate the decreasing distance between him and the image? *

2 points

11m

29.By Which method transmission of light through the given equipment takes place *

2 points

By refraction

By reflection

By scatter

By total internal reflection

30. Consider the travelling of the light beam on the convex lens A - the parallel light beam breaks and travels through the focal point B - the light beam passing through the focal breaks at the lens and travels back to the focal point C - the light beam passing through the optical center does not break. *

2 points

A,B

B,C

A,C

A,B,C

31.Calculate the Distance of the object where the object is placed in such a way that the magnifying vertical image appears in a pit with a focal length of 5cm *

2 points

4cm

5cm

6cm

10cm

32.What is the False statement about the image appearing on the convex lens *

2 points

The image is infinite when the object is in focus

The image is infinite when the object is in 2F

Real image appears wherever the object is placed

The same size as the object image appears when the object is at 2F

33. Which image shows the correct path of the light rays *

2 points

Option 1

Option 2

Option 3

Option 4

34. Which is shown in the given figure *

2 points

Compound microscope

Telescope

Simple microscope

Binocular

35. What is the Correct statements regarding the below figure *

2 points

The image will appear in focus

The virtual image will appear

The image appears beyond 2F

The image will appear at infinity

35. The fish appears to the man at a slightly higher position. What is the reason for this? *

2 points

Reflection of light

Refraction

Water is polluted

Defect of vision

36. What is the Correct diagram , where the object is placed in front of the concave mirror during shaving *

2 points

Option 1

Option 2

Option 3

Option 4

37. Which is the incorrect statement regarding the light ray *

2 points

Reflected

Travel through the vacuum

Refrected

Doesn't transmitted the energy

Other:

38.What is the Natural phenomenon related to the total internal reflection *

2 points

Mirage

Lightening

Thunder

Solar eclipse

Option 5

39. What is the special name given to the angle of refraction is 90 degrees *

2 points

Angle of emergence

Critical angle

Angle of refraction

Incident angle

40. When an object is placed at a distance of 10 cm in front of a concave mirror, an inverted image of three times larger inversion is obtained. Calculate the distance of image *

3 points

10cm

20cm

30cm

40cm

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