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- 1. Fill in the Blank
When a ray of light entering from air is incident on the surface of a glass slab at an angle of 90°, the measure of angle of refraction=
- 2. Fill in the Blank
The focal length of a plane mirror is ____________
- 3. Fill in the Blank
As per laws of reflection of light angle of incidence is always equal to angle of ___________.
- 4. Multiple Choice
The type of mirror used in reflector in automobile lights is
Plane mirror
Concave mirror
Convex mirror
None of the above
- 5. Fill in the Blank
The range of wavelength of visible light in Å units is ________
- 6. Multiple Choice
A mirror having focal length –15 cm is _________________
Plane mirror
Concave mirror
Convex mirror
None of these
- 7. Multiple Choice
Assertion: For observing the traffic at the hairpin bend in the mountains a plane mirror is preferred over convex or concave mirror.
Reason: A convex mirror has a much larger field view than a plane mirror or a concave mirror.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
Assertion is true but Reason is false.
Assertion is false but Reason is true.
- 8. Multiple Choice
Which of the following is not the characteristics of the image formed on a plane mirror?
Virtual
Laterally inverted
Erect
Enlarged
- 9. Fill in the Blank
__________________ waves do not require material medium for propagation.
- 10. Fill in the Blank
A bundle of light rays is called a ______ of light.
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