Hii friends good evening.plz tell me about the construction of a refle

1.	Hii friends good evening.plz tell me about the construction of a reflecting Periscope
Answer» A periscope is an optical instrument that uses a system of PRISMS, lenses, or MIRRORS to reflect images through a tube. Light from a distant object strikes the top MIRROR and is thenreflected at an angle of 90 degrees down the periscope tube.In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45° angle.

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Guys...this may seems to be hard...bt no...it's not...I need to know the solution of only part:-(d) & (e)(a)The moment of inertia of a disc of radius 0.5 m about its geometric axis is 2kg-m2. If a string is tied toits circumference and a force of 10 Newton is applied, the value of torque with respect to this axis will be(1) 2.5 N-m21275 N-m(3) 10 N-m(4) 20 N-m(b)In the above question, if the disc executes rotatory motion, its angular acceleration will be :-(1) 2.5 rad/sec(2) 5 rad/sec(3) 10 rad/sec(4) 20 rad/sec(c)In the above question, the value of its angular velocity after 2 seconds will be :-(1) 2.5 rad/sec(2) 5 rad/sec(3) 10 rad/sec(4) 20 rad/sec(d)In the above question, the change in angular momentum of disc in first 2 seconds in Nm second will be(1) 2.5(2) 5(3) 10(4) 20(e)In the above question, angular displacement of the disc, in first two second will be in radian:-(1) 2.5(2) 5(3) 10(4) 20Plz guys...I just don't wanna copy it in my hw...I wanna learn how the correct answer came out...so plz explain your solution with proper formula and sign and don't spam...plzWould be very thankful to you...!!!
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Hii friends good evening.plz tell me about the construction of a reflecting Periscope

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