With reference to BL Lacertae (BL Lac) consider the following statements:1.It is a type of active galactic nucleus (AGN).2.BL Lacs are characterized by rapid and large-amplitude flux variability and significant optical polarization.3.BL Lac objects have spectra dominated by a relatively featureless non-thermal emission continuum over the entire electromagnetic range.Which of the statements given above are correct?

Q. With reference to BL Lacertae (BL Lac) consider the following statements::
1.It is a type of active galactic nucleus (AGN).
2.BL Lacs are characterized by rapid and large-amplitude flux variability and significant optical polarization.
3.BL Lac objects have spectra dominated by a relatively featureless non-thermal emission continuum over the entire electromagnetic range.
Which of the statements given above are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: D

Notes:

Explanation –

Statement 1, 2 and 3 are correct. BL Lac is a type of active galactic nucleus (AGN). BL Lacs are characterized by rapid and large-amplitude flux variability and significant optical polarization. BL Lac objects have spectra dominated by a relatively featureless non-thermal emission continuum over the entire electromagnetic range.

Source: ForumIAS

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