Question

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Answer 1

☞ 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 2

Answer:

1-80 degree

2-50 degree

3-40 degree

4-10 degree

5-30 degree

Explanation:

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