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☞ ❶ Sᴏʟᴜᴛɪᴏɴ :-
- Angle between incident ray & mirror = 40°
- Reflection ray = ?
Taking the normal in the middle of the mirror . Now ,the one of the angle is 40° and the other angle will be 90° - 40° = 50° . So angle of incidence = 50° . As we know that , angle of incidence = angle of reflection . Hence, reflected angle = 50° .
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☞ ❷ Sᴏʟᴜᴛɪᴏɴ :-
- Angle between incident ray and reflected ray = 100°
- angle of reflection = ?
From the above solution , angle of incidence = angle of reflection .So, 2( angle of incidence or reflection ) = 100°
⇒ 2 ( ∠i ) = 100°
⇒ ∠i = 100°/2
⇒ ∠i = 50°
♦ ∠i = ∠r
⇒ ∠r = 50°
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☞ ❸ Sᴏʟᴜᴛɪᴏɴ :-
- Angle of incidence = 20°
- Angle of reflection = ?
♦ ∠i = ∠r
⇒ ∠r = 20°
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☞ ❹ Sᴏʟᴜᴛɪᴏɴ :-
- Angle of incidence = 20°
- Angle of glance = ?
- Glancing angle :- Angle between incident ray and mirror is glancing angle
♦ ∠g = 90° - i
⇒ ∠g = 90° - 20°
⇒ ∠g = 70°
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☞ ❺ Sᴏʟᴜᴛɪᴏɴ :-
- Angle between incident ray and mirror [ angle of glancing ] = 30°
- Angle between reflected ray and mirror [ angle of glancing ] = ?
♦ Angle between incident ray and mirror = Angle between reflected ray and mirror
⇒ Angle of glancing = 30°
Answer:
1-80 degree
2-50 degree
3-40 degree
4-10 degree
5-30 degree
Explanation:
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