Another Ray optics question

[limpid quartz]

<@&1227987967939838003>

Note for OP

+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.

[fallow knoll]

refractive index should be more than the critical angle

for tir so just find that

[ebon matrix]

+solved @fallow knoll