Light - reflection and refraction

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=

The focal length of a plane mirror is ____________

As per laws of reflection of light angle of incidence is always equal to angle of ___________.

The type of mirror used in reflector in automobile lights is

• Plane mirror

• Concave mirror

• Convex mirror

• None of the above

Tags

NGSS.MS-PS4-2

The range of wavelength of visible light in Å units is ________

A mirror having focal length –15 cm is _________________

• Plane mirror

• Concave mirror

• Convex mirror

• None of these

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.

Which of the following is not the characteristics of the image formed on a plane mirror?

• Virtual

• Laterally inverted

• Erect

• Enlarged

__________________ waves do not require material medium for propagation.

A bundle of light rays is called a ______ of light.