Question

derive an expression for minimum deviation for a prism
explain with diagram​

Answer 1

Answer:

Explanation:

ᴀ=ᴩʀɪꜱᴍ ᴀɴɢʟᴇ, δ=ᴀɴɢʟᴇ ᴏꜰ ᴅᴇᴠɪᴀᴛɪᴏɴ, ɪ1=ᴀɴɢʟᴇ ᴏꜰ ɪɴᴄɪᴅᴇɴᴄᴇ, ɪ2=ᴀɴɢʟᴇ ᴏꜰ ᴇᴍᴇʀɢᴇɴᴛ.

1. ɪɴ ᴛʜᴇ ᴄᴀꜱᴇ ᴏꜰ ᴍɪɴɪᴍᴜᴍ ᴅᴇᴠɪᴀᴛɪᴏɴ,∠ʀ1=∠ʀ2=∠ʀ.
2. ᴀ=∠ʀ1+∠ʀ2
3. ᴀ+δ=ɪ1+ɪ2 (∵ ɪɴ ᴛʜᴇ ᴄᴀꜱᴇ ᴏꜰ ᴍɪɴɪᴍᴜᴍ ᴅᴇᴠɪᴀᴛɪᴏɴ.
4. ɪ1=ɪ2=ɪ ᴀɴᴅ δ=δᴍ)

Answer 2

Answer ❤️

A= prism angle, €= angle of deviation I 1 is equal to angle of incidence I 2 is equal to angle

• in the case of minimum deviation, angle R1 = angle R2 = angle r
• A= angle R1+angle R2
• A+,£=i1+i2 (indication of minimum deviation.
• i1 = i2 = I and £=£m

hope help you

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