Class-7 Science – 11 Light

 

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#1. light travels along ______

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#2. One way to change the direction of light is to let it fall on a ______ surface

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#3. The surface of water can also act like a mirror and change the path of light.

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#4. ___ polished or a shiny surface can act as a mirror.

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#5. This change of direction by a mirror is called ____ of light

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#6. if image remains upright then such image is called ___

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#7. An image formed by a plane mirror is erect and of the ____ size as the object.

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#8. An image formed by a plane mirror is is at the ___ distance behind the mirror as the object is in front of it.

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#9. in the mirror the ‘right’ appears ‘____’

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#10. side mirror of a scooter images of all the objects appear _____ than the objects themselves.

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#11. In stainless steel plate image will be erect and is of the ____ size

#12. The inner surface of the cut ball is called ____

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#13. The outer surface of the cut ball is called _____

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#14. image of an object formed by a plane mirror ____ obtained on a screen.

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#15. An image formed on a screen is called a _____ image

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#16. The image formed by a plane mirror is called a ____ image.

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#17. Image formed by a concave mirror can be ____

Select all that apply:

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#18. Doctors uses ____ mirrors for examining eyes, ears, nose and throat and teeth.

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#19. The reflectors of torches, headlights of cars and scooters are _____ in shape

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#20. ____ mirrors can form images of objects spread over a large area.

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#21. ____ mirrors used as side mirror in automobiles.

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#22. Those lenses which feel thicker in the middle than at the edges are called ____ lenses.

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#23. Those lenses which feel thinner in the middle than at the edges are called _____ lenses.

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#24. A convex lens bends _____ the light falling on it.

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#25. A concave lens bends _____ the light falling on it.

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#26. Image formed by a concave lens is always ____.

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#27. How many colours are present in a rainbow?

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#28. Which color are not a part in a rainbow ?

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#29. you can see a rainbow only when your back is towards the ___.

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#30. sunlight consists of ___ number of colours

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#31. Write the name of sunlight color.

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#32. White light consists of ____ numbers of colours.

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#33. Light travels along ____ lines.

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#34. Any polished or a shining surface acts as a _____

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#35. An image which can be obtained on a screen is called a ___ image

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#36. An image which cannot be obtained on a screen is called a _____ image.

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#37. The image formed by a plane mirror is _____

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#38. In an image formed by a mirror the left side of the object is seen on the ______ in the image.

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#39. A concave mirror can form a ____ image.

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#40. A concave mirror formed virtual, erect and magnified image, When the object is placed ____to the mirror.

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#41. Image formed by a convex mirror is_____

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#42. A concave lens always forms ____

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#43. A convex lens can form real and inverted image.

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#44. In a convex lens when the object is placed very close to the lens, the image formed is__

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#45. Image formed by a convex _______ is always virtual and smaller in size.

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#46. An image formed by a __________ mirror is always of the same size as that of the object.

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#47. An image formed by a concave ___________ cannot be obtained on a screen.

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#48. We can obtain an enlarged and erect image by a convex mirror.

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#49. A concave lens always form a virtual image.

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#50. A concave mirror always form a real image.

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#51. ____ Mirror can form an image of objects spread over a large area.

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#52. ____ lens used as a magnifying glass.

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#53. _____ mirror used by dentists to see an enlarged image of teeth.

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#54. In ____ lens the image is erect and smaller in size than the object.

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#55. Find out the letters of English alphabet in which the image formed in a plane mirror appears exactly like the letter itself.

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