Objective questions of ray optics
this assignment will provide the important Objective questions of ray optics for students preparing for class-12th board examination and for the students preparing for JEE/NEET and other competitive examinations.
Reflection and Refraction of Light at Plane Surface ( Objective questions of ray optics)
- When light travels from glass to air, the incident angle is and the refraction angle is .the true relation is :(a)θ 1 =θ 2 (b) θ 1 >θ2 (c)θ1 <θ2 (d)Not predictable
- Two mirrors are kept at 60 to each other and a body is placed in the middle.The total number of images formed is:(a)Three(b)Four (c)Five (d)Six
- If an object is placed unsymmetrically between two plane mirrors inclined at an angle 72 ,then the total number of images formed is:(a)5 (b)4 (c)2 (d)infinite
- If an object is placed symmetrically between two plane mirrors, inclined at an angle of 72 .than the total total number of images formed is:(a)5 (b)4 (c)2 (d)Infinite
5) A ray of light is incident on a plane mirror at an angle of incidence of 30⁰ ,the deviation
Produced by the mirror is :
(a) 30 ⁰ ( b) 60⁰
(c) 90⁰ (d) 120
6) when a ray of light enters a glass slab from air:
(a) its wavelength decreases
(b) its wavelength decreases
(c) its frequency increases
(d) neither wavelength nor frequency changes
7) When a light enters from air to water, then its:
(a) frequency increases and speed decreases
(b) frequency is the same but the wavelength is smaller in water then in air:
(c) frequency is same but wavelength in water is greater than in air
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